US20100128228A1 - Projector and projector system - Google Patents
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- US20100128228A1 US20100128228A1 US12/623,019 US62301909A US2010128228A1 US 20100128228 A1 US20100128228 A1 US 20100128228A1 US 62301909 A US62301909 A US 62301909A US 2010128228 A1 US2010128228 A1 US 2010128228A1
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- G—PHYSICS
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
- G03B37/04—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with cameras or projectors providing touching or overlapping fields of view
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- G—PHYSICS
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/30—Details adapted to collapse or fold, e.g. for portability
Definitions
- the present invention relates to a projector (a projecting apparatus) that projects images on a screen.
- JP-A-5-142655 and JP-A-2002-311501 disclose the technique for setting plural projectors and joining, on a screen, images respectively projected from the projectors to thereby project a relatively large image on the screen.
- JP-A-2004-198602 discloses the stationary screen and the movable stand-alone screen as screens used for projection of images.
- JP-A-9-162562, JP-A-2001-111917, and JP-A-2006-235156 disclose the stand having the structure in which plural wheels are provided on the bottom surface of a box, on which a projector is installed, in order to make it easy to set and carry the projector.
- the projector can be smoothly carried on a flat floor surface.
- the plural wheels are provided on the bottom surface of the box, it is difficult to smoothly carry the projector on steps and stairs. Therefore, in places where projection of images is required, it is necessary to prepare and maintain a projector set including the stand in each of plural sections divided by steps and stairs (e.g., in each of floors of buildings), leading to an increase in cost.
- An advantage of some aspects of the invention is to provide a technique for making it possible to easily set a projector.
- a projector according to Application Example A1 is a projector that projects an image on a screen, including: plural imaging optical units that generate projection lights representing the image; a main body housing that houses the plural imaging optical units; and plural projecting units that are provided in the main body housing to respectively correspond to the plural imaging optical units and project the projection lights generated by the imaging optical units on the screen.
- the projector according to Application Example A1 since the plural imaging optical units and the plural projecting units are positioned in the main body housing, it is possible to reduce a load for aligning plural images respectively projected from the plural projecting units.
- each of the plural imaging optical units generates projection light representing a partial image corresponding to a part of a display area in an image projected on the screen, and each of the plural projecting units projects the projection light generated by the imaging optical unit on the display area corresponding to the partial image on the screen.
- the projector according to Application Example A2 it is possible to realize an increase in the size of an image projected on the screen while reducing a load for aligning plural images respectively projected from the plural projecting units.
- the main body housing has plural planes that form an outer surface, and the plural projecting units are provided on the same plane in the main body housing.
- the projector according to Application Example A3 it is possible to reduce a load for aligning plural images respectively projected from the plural projecting units compared with a load applied when the plural projecting units are provided over the plural planes.
- the plural imaging optical units and the plural projecting units line up substantially in a straight line.
- the projector according to Application Example A4 it is possible to efficiently house the plural imaging optical units and the plural projecting units in the inside of the main body housing.
- the projector according to any one of Application Examples A1 to A5 further includes: a light source that radiates light; and a light distributing unit that distributes the light radiated from the light source to the respective plural imaging optical units.
- a light source that radiates light
- a light distributing unit that distributes the light radiated from the light source to the respective plural imaging optical units.
- a form of the invention is not limited to the projector.
- the invention can also be applied to other forms such as a system including the projector and a projection method for projecting an image on the screen.
- the invention is not limited to the forms explained above. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- a projector according to Application Example B1 is a projector that projects an image on a screen, including: plural imaging optical units that generate projection lights representing the image; a main body housing that houses the plural imaging optical units; plural projecting units that are provided in the main body housing to respectively correspond to the plural imaging optical units and project the projection lights generated by the imaging optical units on the screen; and an extending and retracting unit that extends and retracts the main body housing in a direction in which the plural projecting units are connected.
- the projector according to Application Example B1 it is possible to increase and decrease spaces among the plural projecting units with the extending and retracting unit of the main body housing after aligning the plural projecting units in the main body housing. As a result, it is possible to realize an increase in the size of an image projected on the screen while reducing a load for aligning plural images respectively projected from the plural projecting units.
- the extending and retracting unit includes a holding unit that holds a state in which the main body housing is extended or retracted.
- the plural projecting units are held in a state in which spaces among the plural projecting units are increased or decreased, it is possible to further reduce a load for aligning plural images respectively projected from the plural projecting units.
- the projector according to Application Example B1 or B2 further includes: an extension and retraction detecting unit that detects an extension/retraction distance of the extended or retracted main body housing; and an image adjusting unit that adjusts, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.
- an extension and retraction detecting unit that detects an extension/retraction distance of the extended or retracted main body housing
- an image adjusting unit that adjusts, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.
- the image adjusting unit includes an expansion and reduction adjusting unit that expands and reduces, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.
- the projector according to Application Example B4 it is possible to expand and reduce, according to spaces among the plural projecting units, an image projected on the screen.
- the image adjusting unit includes an optical-axis adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, optical axes of projection lights projected from the plural projecting units.
- the projector according to Application Example B5 it is possible to move, according to spaces among the plural projecting units, optical axes of projection lights projected from the plural projecting units.
- the image adjusting unit includes a focus adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, focuses of projection lights projected from the plural projecting units.
- the image adjusting unit includes a focus adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, focuses of projection lights projected from the plural projecting units.
- the image adjusting unit includes a keystone-distortion adjusting unit that corrects, according to the extension/retraction distance detected by the extension and retraction detecting unit, a keystone distortion of an image projected on the screen.
- the projector according to Application Example B7 it is possible to correct, according to spaces among the plural projecting units, a keystone distortion of an image projected on the screen.
- each of the plural imaging optical units generates projection light representing a partial image corresponding to a part of a display area in an image projected on the screen, and each of the plural projecting units projects the projection light generated by the imaging optical unit on the display area corresponding to the partial image on the screen.
- the projector according to Application Example B8 it is possible to realize an increase in the size of an image projected on the screen while reducing a load for aligning plural images respectively projected from the plural projecting units.
- a form of the invention is not limited to the projector.
- the invention can also be applied to other forms such as a system including the projector and a projection method for projecting an image on the screen.
- the invention is not limited to the forms explained above. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- An image projection system includes: a sheet-like screen that can be wound and unwound; a screen winding unit that performs winding and unwinding of the sheet-like screen; a main body housing that can house the wound sheet-like screen; and a projector that projects an image on the unwound sheet-like screen housed in the main body housing.
- the projector can be housed in the main body housing and the sheet-like screen is wound and housed in the inside of the main body housing, a user can easily carry the projector and the screen. Since a positional relation between the screen and the projector does is not substantially different depending on a setting place, the user can easily perform adjustment for projection.
- the image projection system according to Application Example C1 includes a plurality of the projectors, the sheet-like screen is unwound to thereby form a projection area on which the image is projected, the projection area has opposed two sides, length of which is not changed by winding and unwinding of the sheet-like screen, and the plural projectors are arranged on the two sides.
- the image projection system according to Application Example C1 or C2 further includes an oscillating element for sound output, and the sheet-like screen functions as a speaker employing the oscillating element.
- the sheet-like screen functions as the speaker, it is possible to easily construct an environment for sound reproduction compared with a configuration in which a speaker device is prepared separately from the projector and the sheet-like screen. Since the sheet-like screen is caused to function as the speaker, it is possible to secure a large acoustic area and perform large-volume sound output.
- the oscillating element is arranged in the inside of the sheet-like screen.
- the projector includes plural projection mechanisms that emit image lights representing an image, and each of the projection mechanisms emits image light of a partial image corresponding to a part of an image projected on the screen.
- the main body housing has plural planes forming an outer surface, and each of the projection mechanisms emits the image light of the partial image from the same plane in the main body housing.
- the plural projection mechanisms are arranged to line up in a straight line in the main body housing.
- a stand according to Application Example D1 is a stand on which a projector is set, including: a pedestal on which the projector is installed; first and second support legs that are foldably connected to the pedestal and rise from a floor surface to support the pedestal in cooperation with each other; a handle that is provided in the first support leg, comes into contact with the floor surface in a state in which the first support leg supports the pedestal, and projects from the pedestal in a state in which the first support leg is folded to the pedestal; and a wheel that is provided in the second support leg, comes into contact with the floor surface in a state in which the second support leg supports the pedestal, and projects from the pedestal in a state in which the second support leg is folded to the pedestal.
- the first and second support legs are foldable generally along a longitudinal direction of the pedestal, the handle projects from one end in the longitudinal direction of the pedestal, and the wheel projects from an end on the opposite side of the one end in the longitudinal direction of the pedestal.
- the stand according to Application Example D1 or D2 further includes: a first connecting unit that connects the pedestal and the first support leg; and a second connecting unit that connects the pedestal and the second support leg, and the first support leg is foldable toward the second connecting unit, and the second support leg is foldable toward the first connecting unit.
- the handle has a bar-like section connected to the wheel and substantially parallel to the wheel.
- the first and second connecting units are drawn out from the pedestal to carry the projector, it is possible to bring the bar-like section into contact with the floor surface to halt the rotation of the wheel.
- the first and second connecting units are folded to the pedestal to carry the projector, it is possible to grip the bar-like section to easily tug the projector.
- the stand according to any one of Application Examples D1 to D4 further includes a position fixing unit that fixes, in multiple stages, positions where the handle and the wheel are set farther away from the pedestal stepwise.
- a position fixing unit that fixes, in multiple stages, positions where the handle and the wheel are set farther away from the pedestal stepwise.
- the stand according to any one of Application Examples D1 to D5 further includes a height adjusting unit that adjusts height at which the projector is installed on the pedestal.
- a height adjusting unit that adjusts height at which the projector is installed on the pedestal.
- the handle comes into contact with the floor surface via a non-slip member having a coefficient of friction higher than that of the first support leg.
- the stand according to Application Example D7 it is possible to prevent the stand from shifting from the floor surface.
- a projector system according to Application Example D8 includes a projector attached to the stand according to any one of Application Examples D1 to D7. With the projector system according to Application Example D8, it is possible to easily carry a projector set including the stand by folding the first and second support legs to the pedestal, bringing the wheel provided in the second support leg into contact with the ground, and gripping the handle provided in the first support leg to tug the projector set.
- the form of the invention is not limited to the stand and the projector system.
- the invention can also be applied to a projection method for projecting an image on the screen, a setting method for setting the projector, and a carrying method for carrying the projector.
- the invention is not limited to the forms explained above. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- a projector according to Application Example E1 includes: a projector main body that projects image light representing an image on a projection surface; and a connecting unit for connecting the projector to another projector with a positional relation thereof fixed.
- the projector itself includes the connecting unit. Therefore, if a plurality of the projectors are prepared and connected via connecting units, it is possible to easily connect the plural projectors without using special devices, instruments, and the like other than the projectors to be connected.
- the connecting unit of the projector fixes a positional relation with another projector connected thereto. Therefore, if a plurality of the projectors are connected, it is possible to accurately arrange the plural projectors. As a result, it is possible to obtain a highly accurate image.
- the connecting unit is detachably attachable.
- the connecting unit is detachably attachable, it is possible to easily connect projectors in a positional relation corresponding to a setting state by changing the length and the shape of the connecting unit.
- the connecting unit includes a signal line for transmitting and receiving an electric signal and electrically connects the projector to the other projector.
- the projector is electrically connected to the other projector by the connecting unit. Therefore, for example, it is possible to perform communication among the connected projectors. As a result, the trouble of connecting plural projectors using wires separate from the projectors is reduced. Since the wires separate from the projectors for connecting the plural projectors are reduced, the projectors are connectedly neatly in appearance.
- the projector according to any one of Application Examples E1 to E3 further includes an exhaust port for discharging the air in the inside of a main body of the projector to the outside of the projector, and the exhaust port is arranged in a position where, when the projector is connected to another projector via the connecting unit, exhaust from the projector does not blow on the other projector.
- the invention can be realized in various forms.
- the invention can be realized in a form of a projector system or the like in which plural same projector main bodies are connected via connecting units.
- FIG. 1 is a diagram for mainly explaining the external configuration of a projector according to a first embodiment of the invention.
- FIG. 2 is a diagram for mainly explaining the configuration of the projector viewed from a top surface of a main body housing.
- FIG. 3 is a diagram for mainly explaining the detailed configuration of the projector.
- FIG. 4 is a diagram for mainly explaining the detailed configuration of a projector in a first modification.
- FIG. 5 is a diagram for mainly explaining the external configuration of a projector in a second modification.
- FIG. 6 is diagram for mainly explaining the external configuration of a projector according to a second embodiment of the invention.
- FIG. 7 is a diagram for mainly explaining the external configuration of the projector in which a main body housing is extended.
- FIG. 8 is a diagram for explaining details of an extending and retracting unit in the main body housing.
- FIG. 9 is a diagram for mainly explaining the detailed configuration of the projector.
- FIG. 10 is a diagram for explaining the detailed configuration of a main control unit.
- FIG. 11 is a diagram for mainly explaining the configuration of the projector viewed from a top surface of the main body housing.
- FIG. 12 is a diagram for explaining the schematic configuration of an image projection system according to a third embodiment of the invention.
- FIG. 13 is a diagram for explaining the image projection system taken along A-A section in FIG. 12 .
- FIG. 14 is a diagram for explaining the detailed configuration of the image projection system.
- FIG. 15A is a diagram for explaining an arrangement example of the image projection system.
- FIG. 15B is a diagram for explaining an arrangement example of the image projection system.
- FIG. 15C is a diagram for explaining an arrangement example of the image projection system.
- FIG. 15D is a diagram for explaining an arrangement example of the image projection system.
- FIG. 16 is a diagram for explaining the schematic configuration of an image projection system in an example C2.
- FIG. 17 is a diagram for explaining the detailed configuration of a first projection unit shown in FIG. 16 .
- FIG. 18 is a diagram for explaining the detailed configuration of a second projection unit shown in FIG. 16 .
- FIG. 19 is a diagram for explaining the schematic configuration of an image projection system in an example C3.
- FIG. 20 is a diagram for explaining the image projection system taken along B-B section in FIG. 19 .
- FIG. 21 is a diagram for explaining the schematic configuration of an image projection system in an example C4.
- FIG. 22 is a diagram for explaining a state in which a projector according to a fourth embodiment of the invention is attached to a stand.
- FIG. 23 is a diagram for explaining a state in which the projector attached to the stand is carried.
- FIG. 24 is a diagram for mainly explaining the detailed configuration of the stand in a setting form viewed from a direction opposed to a screen.
- FIG. 25 is a diagram for mainly explaining the detailed configuration of the stand transformed into a carrying form from the state shown in FIG. 24 .
- FIG. 26 is a diagram for explaining the detailed configuration of the stand in the carrying form shown in FIG. 25 viewed from a floor surface.
- FIG. 27 is a diagram for mainly explaining the external configuration of the projector.
- FIG. 28 is a diagram for mainly explaining the detailed configuration of a stand in the setting form in a first modification viewed from the direction opposed to the screen.
- FIG. 29 is a diagram for mainly explaining the detailed configuration of a stand in the setting form in a second modification viewed from the direction opposed to the screen.
- FIG. 30 is a diagram for explaining a handle in another embodiment.
- FIG. 31 is a schematic diagram for explaining the configuration of a projector in an example E1 of a fifth embodiment.
- FIG. 32 is a schematic diagram of a state in which first and second connecting units are removed from a projector main body.
- FIG. 33 is a diagram for explaining a connection process for three projectors.
- FIG. 34 is an enlarged diagram of an X section in FIG. 33 .
- FIG. 35 is a diagram for explaining a flow of the air flowing through the three projectors when the projectors are connected and used.
- FIG. 36 is a diagram of an example in which the three first projectors are connected and used.
- FIG. 37 is a schematic diagram for explaining the configuration of a projector system in an example E2.
- FIG. 38 is a schematic diagram of projectors in a modification.
- FIG. 39A is a diagram of a modification of an image displayed by the three projectors.
- FIG. 39B is a diagram of a modification of the image displayed by the three projectors.
- FIG. 39C is a diagram of a modification of the image displayed by the three projectors.
- FIG. 40A is a sectional view of a modification of a second connecting unit of a first projector.
- FIG. 40B is a sectional view of a modification of a first connecting unit of a second projector.
- FIG. 1 is a diagram for mainly explaining the external configuration of a projector 10 .
- the projector 10 projects an image RP on a screen 80 .
- the screen 80 is a plane on which the image RP is displayed.
- the screen 80 may be a movie screen or may be a wall surface.
- the image RP projected by the projector 10 is an image formed by joining two partial images RPa and RPb.
- an overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in a seam of the partial image RPa and the partial image RPb.
- the projector 10 includes light source units 20 a and 20 b that radiate lights, image generating units 30 a and 30 b that generate projection lights representing the image RP, and projection optical units 40 a and 40 b that project the projection lights representing the image RP on the screen 80 .
- the partial image RPa in the image RP is projected by using the light source unit 20 a , the image generating unit 30 a , and the projection optical unit 40 a .
- the light radiated from the light source unit 20 a is projected on the screen 80 from the projection optical unit 40 a after being modulated into projection light representing the partial image RPa by the image generating unit 30 a .
- the partial image RPb in the image RP is projected by using the light source unit 20 b , the imaging optical unit 30 b , and the projection optical unit 40 b .
- the light radiated from the light source unit 20 b is projected on the screen 80 from the projection optical unit 40 b after being modulated into projection light representing the partial image RPb by the image generating unit 30 b . Details of the light source units 20 a and 20 b , the image generating units 30 a and 30 b , and the projection optical units 40 a and 40 b are explained later.
- the projector 10 includes a main body housing 50 that houses the light source units 20 a and 20 b , the image generating units 30 a and 30 b , and the projection optical units 40 a and 40 b .
- the main body housing 50 is a hexahedron. Outer surfaces forming the hexahedron include a top surface 51 , a bottom surface 52 , a front surface 53 , a back surface 54 , a left side 55 , and a right side 56 .
- the top surface 51 of the main body housing 50 is an upper end located in an upper part in the main body housing 50 .
- the bottom surface 52 of the main body housing 50 is a bottom end as a surface opposed to the top surface 51 .
- the front surface 53 of the main body housing 50 is a front end facing the screen 80 in the main body housing 50 .
- the back surface 54 of the main body housing 50 is a surface opposed to the front surface 53 and is a rear end with the back thereof facing the screen 80 in the main body housing 50 .
- the left side 55 of the main body housing 50 is a side end located on the left side in front of the screen 80 .
- the right side 56 of the main body housing 50 is a side end located on the right side in front of the screen 80 .
- the top surface 51 , the bottom surface 52 , the front surface 53 , and the back surface 54 of the main body housing 50 are rectangles having long sides extending from the left side 55 to the right side 56 .
- the projection optical unit 40 b , the image generating unit 30 b , the light source unit 20 b , the light source unit 20 a , the image generating unit 30 a , and the projection optical unit 40 a line up substantially in a straight line in this order from the left side 55 to the right side 56 of the main body housing 50 .
- openings 49 a and 49 b for exposing the projection optical units 40 a and 40 b to the outside of the main body housing 50 are provided such that projection lights from the projection optical units 40 a and 40 b reach the screen 80 .
- the main body housing 50 houses the entire projection optical units 40 a and 40 b .
- the main body housing 50 may house the projection optical units 40 a and 40 b with a part thereof projecting from the openings 49 a and 49 b .
- both the openings 49 a and 49 b are provided in the top surface 51 of the main body housing 50 .
- the projection optical units 40 a and 40 b are also provided on the top surface 51 as the same plane in the main body housing 50 .
- FIG. 2 is a diagram for mainly explaining the configuration of the main body housing 50 of the projector 10 viewed from the top surface 51 .
- an optical axis APa of projection light projected from the projection optical unit 40 a inclines at an angle ⁇ a in a direction opposite to a direction in which the projection optical unit 40 b adjacent to the projection optical unit 40 a is located.
- an optical axis APb of projection light projected from the projection optical unit 40 b inclines at an angle ⁇ b in a direction opposite to a direction in which the projection optical unit 40 a adjacent to the projection optical unit 40 b is located. Therefore, in this example, the optical axes APa and APb incline in the directions opposed to each other.
- FIG. 3 is a diagram for mainly explaining the detailed configuration of the projector 10 .
- the light source unit 20 a of the projector 10 includes a light source 21 that radiates light.
- the light source 21 is an ultra-high pressure mercury lamp (UHE lamp).
- the light source 21 may be a light emitting diode (LED).
- the configuration of the light source unit 20 b is the same as that of the light source unit 20 a.
- the image generating unit 30 a of the projector 10 is a color separating and combining optical unit.
- the image generating unit 30 a separates light radiated by the light source 21 into red light, green light, and blue light, modulates the respective lights, and then combines these lights as one light again to thereby generate projection light.
- the image generating unit 30 a includes integrator lenses 31 and 32 , a polarization converting element 33 , dichroic mirrors 34 and 35 , spatial light modulators 38 r , 38 g , and 38 b , and a dichroic prism 39 .
- the number of spatial light modulators is three.
- the number of spatial light modulators may be equal to or smaller than three or may be equal to or larger than three.
- the spatial light modulators are transmissive liquid crystal panels that modulate transmitted light.
- a reflective liquid crystal panel that modulates reflected light may be used or a micro-mirror type light modulating device such as a digital micro-mirror device (DMD (registered trademark)) may be used.
- DMD digital micro-mirror device
- the projection optical unit 40 a of the projector includes a front lens 41 , a zoom lens 42 , a master lens 43 , a focus lens 44 , and a parallel glass 45 . These lenses are arrayed in this order to configure a projection lens unit.
- the zoom lens 42 and the focus lens 44 move back and forth along an optical axis of the projection optical unit 40 a .
- the projection optical unit 40 a further includes a reflection mirror 48 that makes projection light from the image generating unit 30 a incident on the parallel glass 45 .
- the projector 10 further includes a main control unit 100 , a user interface 130 , an image input unit 140 , spatial-light-modulation control units 150 a and 150 b , lens driving units 160 a and 160 b , and an imaging sensor 182 .
- the user interface 130 of the projector 10 receives instruction input from a user of the projector 10 .
- the user interface 130 includes, in addition to plural buttons for receiving pressing input from the user, an infrared interface that receives infrared input from a remote controller.
- the image input unit 140 of the projector 10 is connected to an external apparatus such as a personal computer or a digital image camera and receives the input of image data representing the image RP projected on the screen 80 .
- the spatial-light-modulation control units 150 a and 150 b of the projector 10 control the spatial light modulators 38 r , 38 g , and 38 b of the image generating units 30 a and 30 b on the basis of the image data received by the image input unit 140 .
- the spatial light modulators 38 r , 38 g , and 38 b are liquid crystal panels.
- the spatial-light-modulation control units 150 a and 150 b are liquid-crystal-panel driving devices.
- the lens driving units 160 a and 160 b of the projector 10 drive the zoom lenses 42 and the focus lenses 44 of the projection optical units 40 a and 40 b.
- the imaging sensor 182 of the projector 10 is an image sensor that captures an image on the screen 80 .
- the imaging sensor 182 is a CCD image sensor (Charge Coupled Device Image Sensor) as one of solid-state imaging devices.
- the imaging sensor 182 may be a CMOS image sensor (Complementary Metal Oxide Semiconductor image sensor).
- the main control unit 100 of the projector 10 controls the units of the projector 10 .
- the main control unit 100 is a computer including a central processing unit (hereinafter referred to as CPU) and a memory.
- CPU central processing unit
- Various functions executed by the main control unit 100 are realized by the CPU operating on the basis of software.
- the functions may be realized by an electronic circuit operating on the basis of a physical circuit configuration thereof.
- the main control unit 100 executes image projection processing for projecting the image RP based on image data input from the image input unit 140 on the screen 80 .
- the image projection processing is processing for generating two image data representing the partial images RPa and RPb on the basis of the image data input from the image input unit 140 .
- the image data representing the partial image RPa is output from the main control unit 100 to the spatial-light-modulation control unit 150 a .
- the image data representing the partial image RPb is output from the main control unit 100 to the spatial-light-modulation control unit 150 b . Consequently, projection light representing the partial image RPa is generated by the image generating unit 30 a and projected on the screen 80 from the projection optical unit 40 a .
- Projection light representing the partial image RPb is generated by the image generating unit 30 b and projected on the screen 80 from the projection optical unit 40 b .
- Portions corresponding to the overlapping area RPw in the partial images RPa and RPb are formed in a comb tooth shape or a mosaic shape to thereby complement each other to form one image such that the seam of the partial image RPa and the partial image RPb is not conspicuous.
- the main control unit 100 executes, on the basis of an image captured by the imaging sensor 182 , image adjustment processing for adjusting the image RP projected on the screen 80 .
- image adjustment processing keystone correction processing, focus adjustment processing, expansion and reduction adjustment processing, unevenness adjustment processing, and the like are applied to each of the partial images RPa and RPb.
- the keystone correction processing is processing for correcting, according to the shape of an image projected on the screen 80 and a distance from the projector 10 to the screen 80 , image data output from the main control unit 100 to the spatial-light-modulation control units 150 a and 150 b such that distortion of the partial images RPa and RPb caused by the tilt of the screen 80 with respect to the projector 10 is reduced.
- the focus adjustment processing is processing for adjusting a focus of projection light according to the distance from the projector 10 to the screen 80 .
- the expansion and reduction adjustment processing is processing for adjusting, according to the size of the screen 80 , the size of the partial images RPa and RPb projected on the screen 80 .
- the unevenness adjustment processing is processing for suppressing color unevenness and luminance unevenness between the partial image RPa and the partial image RPb to thereby obtain uniform color reproducibility over the entire display area of the image RP.
- the plural image generating units 30 a and 30 b and the plural projection optical units 40 a and 40 b are positioned in the main body housing 50 , it is possible to reduce a load for aligning the plural partial images RPa and RPb respectively projected from the plural projection optical units 40 a and 40 b.
- the plural partial images RPa and RPb are combined to project one image RP on the screen 80 . This makes it possible to realize an increase in the size of the image RP projected on the screen 80 while reducing a load for aligning the plural partial images RPa and RPb respectively projected from the plural projection optical units 40 a and 40 b.
- the plural projection optical units 40 a and 40 b are provided on the top surface 51 as the same plane in the main body housing 50 . This makes it possible to reduce a load for aligning the plural partial images RPa and RPb compared with a load applied when the plural projection optical units 40 a and 40 b are provided over the plural planes.
- the plural image generating units 30 a and 30 b and the plural projection optical units 40 a and 40 b line up substantially in a straight line. This makes it possible to efficiently house the plural image generating units 30 a and 30 b and the plural projection optical units 40 a and 40 b in the inside of the main body housing 50 .
- the optical axis APa of the projection optical unit 40 a inclines at the angle ⁇ a to the opposite side of the direction in which the projection optical unit 40 b is located.
- the optical axis APb of the projection optical unit 40 b inclines at the angle ⁇ b to the opposite side of the direction in which the projection optical unit 40 a is located. This makes it possible to project projection light in a wider range and realize an increase in the size of the image RP projected on the screen 80 .
- FIG. 4 is a diagram for mainly explaining the detailed configuration of the projector 12 in a first modification.
- a projector 12 in the first modification is the same as the projector 10 explained above except that the projector 12 includes, instead of the light source units 20 a and 20 b in the projector 10 , a light source unit 20 that supplies light to both the image generating unit 30 a and the image generating unit 30 b in common.
- the light source unit 20 of the projector 12 includes a light source 21 and a light distributing unit 24 .
- the light source 21 of the light source unit 20 is an ultra-high pressure mercury lamp (UHE lamp).
- the light source 21 may be a light emitting diode (LED).
- the light distributing unit 24 of the light source unit 20 distributes light radiated from the light source 21 to each of the image generating units 30 a and 30 b .
- the light distributing unit 24 distributes the light using a prism.
- the light distributing unit 24 may distribute the light using an optical fiber.
- FIG. 5 is a diagram for mainly explaining the external configuration of a projector 13 in a second modification.
- the projector 10 explained above includes the two light source units 20 a and 20 b , the two image generating units 30 a and 30 b , and the two projection optical units 40 a and 40 b .
- the projector 13 in the second modification includes three light source units 20 a , 20 b , and 20 c , three image generating units 30 a , 30 b , and 30 c , and three projection optical units 40 a , 40 b , and 40 c .
- the image RP projected by the projector 13 is an image obtained by joining three partial images RPa, RPb, and RPc.
- the overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in a seam of the partial image RPa and the partial image RPb.
- the overlapping area RPw where the two partial images RPb and RPc overlap each other is formed in a seam of the partial image RPb and the partial image RPc.
- the light source unit 20 c , the imaging optical unit 30 c , and the projection optical unit 40 c in the projector 13 in the second modification are the same as the light source unit 20 b , the image generating unit 30 b , and the projection optical unit 40 b in the projector 10 explained above.
- the partial image RPc in the image RP is projected by using the light source unit 20 c , the imaging optical unit 30 c , and the projection optical unit 40 c .
- light radiated from the light source unit 20 c is projected on the screen 80 from the projection optical unit 40 c after being modulated into projection light representing the partial image RPc by the imaging optical unit 30 c.
- the main body housing 50 of the projector 13 in the second modification houses the light source units 20 a , 20 b , and 20 c , the image generating units 30 a , 30 b , and 30 c , and the projection optical units 40 a , 40 b , and 40 c .
- the projection optical unit 40 c , the imaging optical unit 30 c , the light source unit 20 c , the projection optical unit 40 b , the image generating unit 30 b , the light source unit 20 b , the light source unit 20 a , the image generating unit 30 a , and the projection optical unit 40 a line up substantially in a straight line in this order from the left side 55 to the right side 56 of the main body housing 50 .
- openings 49 a , 49 b , and 49 c for exposing the projection optical units 40 a , 40 b , and 40 c to the outside of the main body housing 50 are provided such that projection lights from the projection optical units 40 a , 40 b , and 40 c reach the screen 80 .
- the openings 49 a , 49 b , and 49 c are provided at an equal interval in the top surface 51 of the main body housing 50 .
- the projection optical units 40 a , 40 b , and 40 c are also provided at an equal interval on the top surface 51 as the same plane in the main body housing 50 .
- an optical axis of the projection optical unit 40 b located in the center among the projection optical units 40 a , 40 b , and 40 c crosses a line connecting the projection optical units 40 a and 40 c at a substantial right angle.
- an optical axis of the projection optical unit 40 a located on the outer side at an end of the line of the projection optical units 40 a , 40 b , and 40 c inclines in a direction opposite to the projection optical units 40 b and 40 c .
- An optical axis of the projection optical unit 40 c located on the outer side at an end of the line of the projection optical units 40 a , 40 b , and 40 c inclines in a direction opposite to the projection optical units 40 a and 40 b.
- the projector 13 in the third modification explained above since the three image generation units 30 a , 30 b , and 30 c and the three projection optical units 40 a , 40 b , and 40 c are positioned in the main body housing 50 , it is possible to reduce a load for aligning the plural partial images RPa, RPb, and RPc respectively projected from the plural projection optical units 40 a , 40 b , and 40 c.
- the three partial images RPa, RPb, and RPc are combined to project one image RP on the screen 80 . This makes it possible to realize a further increase in the size of the image RP projected on the screen 80 while reducing a load for aligning the plural partial images RPa, RPb, and RPc respectively projected from the plural projection optical units 40 a , 40 b , and 40 c.
- a light source unit in a projector including three or more imaging optical units may be plural light source units respectively corresponding to the three or more imaging optical units or may be a light source unit that supplies light to each of the three or more imaging optical units in a distributed manner.
- a plane for arranging the projecting units in the main body housing 50 is not limited to the top surface 51 .
- the projecting units may be arranged on any one of the bottom surface 52 , the front surface 53 , the back surface 54 , the left side 55 , and the right side 56 according to a setting form of the projector, an external shape of the projector, relative positions of the projector and the screen, and the like or may be arranged over two or more planes.
- the projecting units and the imaging optical units are arranged substantially in a straight line.
- the projecting units and the imaging optical units may be arranged in a lattice shape in which vertical columns and horizontal columns cross each other.
- the projecting units are not limited to projection lens units in which plural lenses are arrayed.
- the projecting units may be optical units that reflect projection lights generated by the imaging optical units to the screen 80 using at least one of an aspherical lens, a magnifying lens, a diffusion glass, an aspherical mirror, and a reflection mirror.
- the image RP is projected in the state in which the projectors 10 and 13 are placed on the stand or the floor.
- the image RP may be projected in a state in which the projectors 10 and 13 are hung from the ceiling or may be projected in a state in which the projectors 10 and 13 are set on the wall.
- FIG. 6 is a diagram for mainly explaining the external configuration of a projector 210 .
- the projector 210 projects the image RP on a screen 280 .
- the screen 280 is a plane on which the image RP is displayed.
- the screen 280 may be a movie screen or may be a wall surface.
- the image RP projected by the projector 210 is an image formed by joining the two partial images RPa and RPb.
- the overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in the seam of the partial image RPa and the partial image RPb.
- the projector 210 includes light source units 220 a and 220 b that radiate lights, image generating units 230 a and 230 b that generate projection lights representing the image RP, and projection optical units 240 a and 240 b that project the projection lights representing the image RP on the screen 280 .
- the partial image RPa in the image RP is projected by using the light source unit 220 a , the image generating unit 230 a , and the projection optical unit 240 a .
- the light radiated from the light source unit 220 a is projected on the screen 280 from the projection optical unit 240 a after being modulated into projection light representing the partial image RPa by the image generating unit 230 a .
- the partial image RPb in the image RP is projected by using the light source unit 220 b , the image generating unit 230 b , and the projection optical unit 240 b .
- the light radiated from the light source unit 220 b is projected on the screen 280 from the projection optical unit 240 b after being modulated into projection light representing the partial image RPb by the image generating unit 230 b . Details of the light source units 220 a and 220 b , the image generating units 230 a and 230 b , and the projection optical units 240 a and 240 b are explained later.
- the projector 210 includes a main body housing 250 that houses the light source units 220 a and 220 b , the image generating units 230 a and 230 b , and the projection optical units 240 a and 240 b .
- the main body housing 250 is a hexahedron. Outer surfaces forming the hexahedron include a top surface 251 , a bottom surface 252 , a front surface 253 , a back surface 254 , a left side 255 , and a right side 256 .
- the top surface 251 of the main body housing 250 is an upper end located in an upper part in the main body housing 250 .
- the bottom surface 252 of the main body housing 250 is a bottom end as a surface opposed to the top surface 251 .
- the front surface 253 of the main body housing 250 is a front end facing the screen 280 in the main body housing 250 .
- the back surface 254 of the main body housing 250 is a surface opposed to the front surface 253 and is a rear end with the back thereof facing the screen 280 in the main body housing 250 .
- the left side 255 of the main body housing 250 is a side end located on the left side in front of the screen 280 .
- the right side 256 of the main body housing 250 is a side end located on the right side in front of the screen 280 .
- the top surface 251 , the bottom surface 252 , the front surface 253 , and the back surface 254 of the main body housing 250 are rectangles having long sides extending from the left side 255 to the right side 256 .
- the projection optical unit 240 b , the image generating unit 230 b , the light source unit 220 b , the light source unit 220 a , the image generating unit 230 a , and the projection optical unit 240 a line up substantially in a straight line in this order from the left side 255 to the right side 256 of the main body housing 250 .
- openings 249 a and 249 b for exposing the projection optical units 240 a and 240 b to the outside of the main body housing 250 are provided such that projection lights from the projection optical units 240 a and 240 b reach the screen 280 .
- the main body housing 250 houses the entire projection optical units 240 a and 240 b .
- the main body housing 250 may house the projection optical units 240 a and 240 b with a part thereof projecting from the openings 249 a and 249 b .
- both the openings 249 a and 249 b are provided in the top surface 251 of the main body housing 250 .
- the projection optical units 240 a and 240 b are also provided on the top surface 251 as the same plane in the main body housing 250 .
- FIG. 7 is a diagram for mainly explaining the external configuration of the projector 210 in which the main body housing 250 is extended.
- the main body housing 250 includes a first housing 250 a , a second housing 250 b , and a third housing 250 c .
- the first housing 250 a forms a section that houses the projection optical unit 240 a .
- the second housing 250 b forms a section that houses the projection optical unit 240 b .
- the third housing 250 c is located between the first housing 250 a and the second housing 250 b and slidably connected to each of the first housing 250 a and the second housing 250 b in directions for connecting the first housing 250 a and the second housing 250 b .
- a connection structure for the first and second housings 250 a and 250 b and the third housing 250 c configure an extending and retracting unit that extends and retracts the main body housing 250 in the directions for connecting the projection optical unit 240 a and the projecting unit 240 b.
- the projection optical unit 240 a is fixed to the first housing 250 a
- the projection optical unit 240 b is fixed to the second housing 250 b
- the light source units 220 a and 220 b and the image generating units 230 a and 230 b are fixed to the third housing 250 c .
- a space between the projection optical unit 240 a and the image generating unit 230 a and a space between the projecting unit 240 b and the image generating unit 230 b increases and decreases.
- the light source unit 220 a , the image generating unit 230 a , and the projection optical unit 240 a may be fixed to the first housing 250 a
- the light source unit 220 b , the image generating unit 230 b , and the projection optical unit 240 b may be fixed to the second housing 250 b
- the sections respectively fixed to the first housing 250 a and the second housing 250 b may move.
- the first housing 250 a and the second housing 250 b are two rectangular parallelepipeds obtained by cutting the retracted main body housing 250 in the center in a longitudinal direction thereof as shown in FIG. 6 .
- the first housing 250 a is a square cylinder having the right side 256 and the second housing 250 b is a square cylinder having the left side 255 .
- the third hosing 250 c is a square cylinder having an external shape slightly smaller than the first housing 250 a and the second housing 250 b . In this example, in a state in which the main body housing 250 is retracted as shown in FIG. 6 , the third housing 250 c enters the first housing 250 a and the second housing 250 b .
- the third housing 250 c is exposed from the first housing 250 a and the second housing 250 b .
- the third housing 250 c may be a square cylinder having an external shape slightly larger than the first housing 250 a and the second housing 250 b and may be connected to the first housing 250 a and the second housing 250 b to be exposed to the outside through the extension and retraction of the main body housing 250 .
- FIG. 8 is a diagram for explaining details of the extending and retracting unit in the main body housing 250 .
- the main body housing 250 in a retracted state is shown in the upper part of FIG. 8 .
- the main body housing 250 in an extended state is shown in the lower part of FIG. 8 .
- the first housing 250 a includes a projection 390 a and the second housing 250 b includes a projection 390 b .
- the third housing 250 c includes a first recess 391 and a second recess 392 .
- the projection 390 a of the first housing 250 a and the projection 390 b of the second hosing 250 b are set in contact with the third housing 250 c .
- the first recess 391 of the third housing 250 c fits with the projection 390 a of the first housing 250 a and the projection 390 b of the second housing 250 b to thereby locate the first housing 250 a and the second housing 250 b in a retracted position.
- the second recess 392 of the third housing 250 c fits with the projection 390 a of the first housing 250 a and the projection 390 b of the second housing 250 b to thereby locate the first housing 250 a and the second housing 250 b in an extended position.
- the projections 390 a and 390 b , the first recess 391 , and the second recess 392 configure a holding unit that holds a state in which the main body housing 250 is extended or retracted.
- the first housing 250 a slides relatively to the third housing 250 c by a distance SRa specified by a space between the first recess 391 and the second recess 392 .
- the second housing 250 b slides relatively to the third housing 250 c by a distance SRb specified by a space between the first recess 391 and the second recess 392 .
- the projector 210 includes extension and retraction detecting units 370 a and 370 b that detect an extension/retraction distance of the main body housing 250 .
- the extension and retraction detecting unit 370 a is a pressing switch provided on a side of the third housing 250 c connected to the first housing 250 a .
- the extension and retraction detecting unit 370 b is a pressing switch provided on a side of the third housing 250 c connected to the second housing 250 b .
- a pressing unit 393 a is provided in a position corresponding to the extension and retraction detecting unit 370 a of the third housing 250 c .
- the pressing unit 393 a presses the extension and retraction detecting unit 370 a in a state in which the first housing 250 a is in the retracted position.
- the pressing unit 393 a separates from the extension and retraction detecting unit 370 a in a state in which the first housing 250 a is in the extended position.
- a pressing unit 393 b is provided in a position corresponding to the extension and retraction detecting unit 370 b of the third housing 250 c .
- the pressing unit 393 b presses the extension and retraction detecting unit 370 b in a state in which the second housing 250 b is in the retracted position.
- the pressing unit 393 b separates from the extension and retraction detecting unit 370 b in a state in which the second housing 250 b is in the extended position. This makes it possible to detect extension/retraction distance of the main body housing 250 on the basis of a combination of ON and OFF of the switches in the extension and retraction detecting units 370 a and 370 b.
- FIG. 9 is a diagram for mainly explaining the detailed configuration of the projector 210 .
- the light source unit 220 a of the projector 210 includes a light source 221 that radiates light.
- the light source 221 is an ultra-high pressure mercury lamp (UHE lamp).
- the light source 221 may be a solid-state light source (e.g., a light emitting diode (LED) or a laser beam source).
- the configuration of the light source unit 220 b is the same as that of the light source unit 220 a.
- the image generating unit 230 a of the projector 210 is a color separating and combining optical unit.
- the image generating unit 230 a separates light radiated from the light source 221 into red light, green light, and blue light, modulates the respective lights, and then combines the lights as one light again to thereby generate projection light.
- the image generating unit 230 a includes integrator lenses 231 and 232 , a polarization converting element 233 , dichroic mirrors 234 and 235 , spatial light modulators 238 r , 238 g , and 238 b , and a dichroic prism 239 .
- the number of spatial light modulators is three.
- the number of spatial light modulators may be equal to or smaller than three or may be equal to or larger than three.
- the spatial light modulators are transmissive liquid crystal panels that modulate transmitted light.
- a reflective liquid crystal panel that modulates reflected light may be used or a micro-mirror type light modulating device such as a digital micro-mirror device (DMD (registered trademark)) may be used.
- DMD digital micro-mirror device
- the projection optical unit 240 a of the projector 210 includes a front lens 241 , a zoom lens 242 , a master lens 243 , a focus lens 244 , and a parallel glass 245 . These lenses are arrayed in this order to configure a projection lens unit.
- the zoom lens 242 and the focus lens 244 move back and forth along an optical axis of the projection optical unit 240 a .
- the projection optical unit 240 a further includes a reflection mirror 248 that makes projection light from the image generating unit 230 a incident on the parallel glass 245 .
- the projector 210 further includes a main control unit 300 , a user interface 330 , an image input unit 340 , spatial-light-modulation control units 350 a and 350 b , lens driving units 360 a and 360 b , and an imaging sensor 382 .
- the user interface 330 of the projector 210 receives instruction input from a user of the projector 210 .
- the user interface 330 includes, in addition to plural buttons for receiving pressing input from the user, an infrared interface that receives infrared input from a remote controller.
- the image input unit 340 of the projector 210 is connected to an external apparatus such as a personal computer and a digital image camera and receives the input of image data representing the image RP projected on the screen 280 .
- the spatial-light-modulation control units 350 a and 350 b of the projector 210 controls the spatial light modulators 238 r , 238 g , and 238 b of the image generating units 230 a and 230 b on the basis of the image data received by the image input unit 340 .
- the spatial light modulators 238 r , 238 g , and 238 b are liquid crystal panels.
- the spatial-light-modulation control units 350 a and 350 b are liquid-crystal-panel driving devices.
- the lens driving units 360 a and 360 b of the projector 210 drive the zoom lenses 242 and the focus lenses 244 of the projection optical units 240 a and 240 b.
- the imaging sensor 382 of the projector 210 is an image sensor that captures an image of the screen 280 .
- the imaging sensor 382 is a CCD image sensor (Charge Coupled Device Image Sensor) as one of solid-state imaging devices.
- the imaging sensor 382 may be a CMOS image sensor (Complementary Metal Oxide Semiconductor image sensor).
- FIG. 10 is a diagram for explaining the detailed configuration of the main control unit 300 .
- the main control unit 300 of the projector 210 controls the units of the projector 210 .
- the main control unit 300 includes an image projecting unit 311 and an image adjusting unit 312 .
- the image projecting unit 311 of the main control unit 300 executes image projection processing for projecting an image based on image data input from the image input unit 340 on the screen 280 .
- the image projection processing is processing for generating two image data representing the partial images RPa and RPb on the basis of the image data input from the image input unit 340 .
- the image data representing the partial image RPa is output from the main control unit 300 to the spatial-light-modulation control unit 350 a .
- the image data representing the partial image RPb is output from the main control unit 300 to the spatial-light-modulation control unit 350 b . Consequently, projection light representing the partial image RPa is generated by the image generating unit 230 a and projected on the screen 280 from the projection optical unit 240 a .
- Projection light representing the partial image RPb is generated by the image generating unit 230 b and projected on the screen 280 from the projection optical unit 240 b .
- Portions corresponding to the overlapping area RPw in the partial images RPa and RPb are formed in a comb tooth shape or a mosaic shape to thereby complement each other to form one image such that the seam of the partial image RPa and the partial image RPb is not conspicuous.
- the image adjusting unit 312 of the main control unit 300 includes an expansion and reduction adjusting unit 313 , an optical-axis adjusting unit 314 , a focus adjusting unit 315 , a keystone-distortion correction unit 316 , and an unevenness adjusting unit 317 .
- the image adjusting unit 312 executes image adjustment processing for adjusting an image projected on the screen 280 .
- the expansion and reduction adjusting unit 313 of the image adjusting unit 312 performs expansion and reduction adjustment processing for expanding or reducing an image projected on the screen 280 according to an extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b .
- the expansion and reduction adjustment processing is processing for adjusting the size of the partial images RPa and RPb projected on the screen 280 by controlling the lens driving units 360 a and 360 b according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b.
- the optical-axis adjusting unit 314 of the image adjusting unit 312 performs optical axis adjustment processing for moving optical axes of projection lights projected from the projection optical units 240 a and 240 b according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b .
- the optical axis adjustment processing is processing for moving the optical axes of the projection optical units 240 a and 240 b by controlling the lens driving units 360 a and 360 b according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b.
- the focus adjusting unit 315 of the image adjusting unit 312 performs focus adjustment processing for moving focuses of the projection lights projected from the projection optical units 240 a and 240 b according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b .
- the focus adjustment processing is processing for moving the focuses of the projection optical units 240 a and 240 b by controlling the lens driving units 360 a and 360 b according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b.
- the keystone-distortion correction unit 316 of the image adjusting unit 312 performs keystone distortion adjustment processing for correcting a keystone distortion of an image projected on the screen 280 according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b .
- the keystone distortion adjustment processing is processing for keystone-correcting video data output from the main control unit 300 to the spatial-light-modulation control units 350 a and 350 b according to the extension/retraction distance of the main body housing 250 detected by the extension and retraction detecting units 370 a and 370 b such that distortion of the partial videos RPa and RPb caused by the tilt of the screen 280 with respect to the projector 210 .
- the unevenness adjusting unit 317 of the video adjusting unit 312 performs unevenness adjustment processing for obtaining uniform color reproducibility over the entire display area of the video RP by suppressing color unevenness and luminance unevenness between the partial video RPa and the partial video RPb.
- the unevenness adjustment processing is processing for correcting video data output from the main control unit 300 to the spatial-light-modulation control units 350 a and 350 b on the basis of an image captured by the imaging sensor 382 .
- the main control unit 300 includes a central processing unit (hereinafter referred to as CPU) 310 , a memory 320 , and an interface 303 .
- the CPU 310 of the main control unit 300 executes various kinds of processing on the basis of computer programs stored in the memory 320 .
- the memory 320 of the main control unit 300 stores data and computer programs treated by the CPU 310 .
- the interface 303 of the main control unit 300 mediates input and output of signals between the CPU 310 and the units of the projector 210 .
- the functions of the image projecting unit 311 and the video adjusting unit 312 are realized by the CPU 310 operating on the basis of software.
- the functions may be realized by an electronic circuit of the main control unit 300 operating on the basis of a physical circuit configuration thereof.
- FIG. 11 is a diagram for mainly explaining the configuration of the projector 210 viewed from the top surface 251 of the main body housing 250 .
- an optical axis APa of projection light projected from the projection optical unit 240 a inclines at an angle ⁇ a in a direction opposite to a direction in which the projecting unit 240 b adjacent to the projection optical unit 240 a is located.
- an optical axis APb of projection light projected from the projection optical unit 240 b inclines at an angle ⁇ b in a direction opposite to a direction in which the projection optical unit 240 a adjacent to the projection optical unit 240 b is located. Therefore, in this example, the optical axes APa and APb incline in the directions opposed to each other.
- a space between the plural projection optical units 240 a and 240 b can be increased and decreased by the connection structure of the first and second housings 250 a and 250 b and the third housing 250 c in the main body housing 250 .
- the projections 390 a and 390 b , the first recess 391 , and the second recess 392 configure a holding unit that holds a state in which the main body housing 250 is extended or retracted. Consequently, since the plural projection optical units 240 a and 240 b are held with a space thereof increased or decreased, it is possible to further reduce a load for aligning the plural partial videos RPa and RPb respectively projected from the plural projection optical units 240 a and 240 b.
- the video adjusting unit 312 of the main control unit 300 adjusts the video RP projected on the screen 280 according to an extension/retraction distance detected by the extension and retraction detecting units 370 a and 370 b . Consequently, since the video RP projected on the screen 280 is adjusted according to the space between the plural projection optical units 240 a and 240 b , it is possible to further reduce a load for aligning the plural partial videos RPa and RPb respectively projected from the plural projection optical units 240 a and 240 b.
- the plural partial videos RPa and RPb are combined to project one video RP on the screen 280 . This makes it possible to realize an increase in the size of the video RP projected on the screen 280 while reducing a load for aligning the plural partial videos RPa and RPb respectively projected from the plural projection optical units 240 a and 240 b.
- the plural projection optical units 240 a and 240 b are provided on the top surface 251 as the same plane in the main body housing 250 . This makes it possible to reduce a load for aligning the plural partial videos RPa and RPb compared with a load applied when the plural projection optical units 240 a and 240 b are provided over the plural planes.
- the plural image generating units 230 a and 230 b and the plural projection optical units 240 a and 240 b line up substantially in a straight line. This makes it possible to efficiently house the plural image generating units 230 a and 230 b and the plural projection optical units 240 a and 240 b in the inside of the main body housing 250 .
- the optical axis APa of the projection optical unit 240 a inclines at the angle ⁇ a to the opposite side of the direction in which the projection optical unit 240 b is located.
- the optical axis APb of the projection optical unit 240 b inclines at the angle ⁇ b to the opposite side of the direction in which the projection optical unit 240 a is located. This makes it possible to project projection light on a wider range and realize an increase in the size of the video RP projected on the screen 280 .
- the embodiment of the invention is explained above. However, the invention is not limited by the embodiment. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- the number of projecting units and imaging optical units is not limited to two and may be equal to or lager than three. Extending units that extend the main body housing 250 may be provided among the projecting units.
- the extending and retracting unit is formed by the connection structure of the first and second housings 250 a and 250 b and the third housing 250 c in the main body housing 250 .
- the extending and retracting unit may be formed by a repeated structure of a mountain fold and a valley fold (a bellows structure or an accordion structure) or an extension and retraction structure such as a slide rail or a pantograph.
- the main body housing 250 is extended and retracted in the two stages of holding the retracted state with the first recess 391 and holding the extended state with the second recess 392 .
- the main body housing 250 may be extended and retracted in positions in three or more stages.
- the projections 390 a and 390 b are provided in the first housings 250 a and 250 b and the first recess 391 and the second recess 392 are provided in the third housing 250 c .
- the projections 390 a and 390 b of the first housings 250 a and 250 b may be replaced with recesses and the first recess 391 and the second recess 392 of the third housing 250 c may be replaced with projections.
- extension and retraction detecting units 370 a and 370 b include the pressing switches.
- an extension/retraction distance of the main body housing 250 may be detected by a displacement sensor or a position sensor that detects the extension/retraction distance using magnetism or light.
- the extending and retracting unit that extends or retracts the main body housing 250 is manually operated by the user to extend or retract the main body housing 250 .
- the extending and retracting unit may extend or retract the main body housing 250 using an electric motor on the basis of an instruction of the main control unit 300 .
- the two light source units 220 a and 220 b are provided to respectively correspond to the two image generating units 230 a and 230 b .
- a light source unit that supplies light to both the image generating unit 230 a and the image generating unit 230 b in common may be provided. This makes it possible to prevent lights supplied to the plural image generating units 230 a and 230 b from becoming non-uniform because of an individual difference of a light source. As a result, it is possible to suppress color unevenness and luminance unevenness between the plural partial videos RPa and RPb respectively projected from the plural projection optical units 240 a and 240 b.
- a plane for arranging the projecting units in the main body housing 250 is not limited to the top surface 251 .
- the projecting units may be arranged on any one of the bottom surface 252 , the front surface 253 , the back surface 254 , the left side 255 , and the right side 256 according to the setting form of the projector, an external shape of the projector, relative positions of the projector and the screen, and the like or may be arranged over two or more planes.
- the projecting units and the imaging optical units are arranged substantially in a straight line.
- the projecting units and the projection optical units may be arranged in a lattice shape in which vertical columns and horizontal columns cross each other.
- the projecting units are not limited to projection lens units in which plural lenses are arrayed.
- the projecting units may be optical units that reflect projection lights generated by the imaging optical units to the screen 280 using at least one of an aspherical lens, a magnifying lens, a diffusion glass, an aspherical mirror, and a reflection mirror.
- the video RP is projected in the state in which the projector 210 is placed on the stand or the floor.
- the video RP may be projected in a state in which the projector 210 is hung from the ceiling or may be projected in a state in which the projector 210 is set on the wall.
- FIG. 12 is a diagram for explaining a schematic configuration of an image projection system as an example of the invention.
- An image projection system 500 projects an image and an image on a screen 490 and outputs sound using the screen 490 .
- the screen 490 is drawn out from the inside of a main body housing 415 , unwound, and used.
- the video RP projected by the image projection system 500 is an image obtained by joining the two partial images RPa and RPb.
- the overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in the seam of the partial image RPa and the partial image RPb.
- the image projection system 500 includes the main body housing 415 , a projecting unit 410 , a screen 490 , a screen winding unit 480 , an oscillating-element-for-speaker driving unit 450 , and an external interface unit 470 .
- the main body housing 415 has a hexahedron shape and has three openings 416 x , 416 y , and 416 z in a front surface W 16 .
- the projecting unit 410 is a projector arranged in the main body housing 415 and has the structure formed by combining two projecting mechanisms. Specifically, the projecting unit 410 includes two light source units (a first light source unit 420 a and a second light source unit 420 b ), two imaging optical unit (a first imaging optical unit 430 a and a second imaging optical unit 430 b ), two projection optical units (a first projection optical unit 440 a and a second projection optical unit 440 b ), and a control unit 460 . The detailed configuration of the projecting unit 410 is explained later. With such structure, the projecting unit 410 emits image light from the two openings 416 x and 416 y . In the example shown in FIG.
- the first projection optical unit 440 a emits image light from the opening 416 x and projects the partial image RPa on the screen 490 .
- the second projection optical unit 440 b emits image light from the opening 416 y and projects the partial image RPb on the screen 490 .
- the screen 490 is formed of a sheet-like member that can be wound. Specifically, the screen 490 has the structure obtained by superimposing two sheets. Of the two sheets, a sheet forming a projection area on which an image (a video) is projected when the sheet is unwound is formed as a diffusion type screen with the surface processed into a white mat. One end of the screen 490 is connected to a screen winding unit 480 and the other end is connected to a columnar support member 492 . The screen 490 can be wound and housed in the main body housing 415 . When the screen 490 is housed, the support member 492 is present in the position of the opening 416 z .
- the user can draw out the screen 490 from the opening 416 z by pulling the support member 492 in a +Z direction.
- the screen winding unit 480 maintains an unwound state.
- Plural oscillating elements 495 for a speaker are arranged at a predetermined interval between the two sheets included in the screen 490 .
- three columns in total each including six oscillating elements 495 are formed in the center and at both the ends of the screen 490 .
- the oscillating elements 495 are arranged at the predetermined interval along a Z direction.
- the oscillating elements 495 are bonded to the screen 490 . Arrangement positions of the oscillating elements 495 in the screen 490 are fixed.
- Each of the oscillating elements 495 includes an excitation plate, an oscillator, and a voice coil that surrounds the oscillator (all of which are not shown in the figure).
- the oscillating elements 495 cause the oscillator to oscillate on the basis of an input electric signal and transmits this oscillation to the screen 490 via the excitation plate.
- the screen 490 oscillates according to the oscillation transmitted from the excitation plate (not shown in the figure) and outputs sound.
- the screen winding unit 480 includes a not-shown torsion spring and can wind the unwound screen 490 . Specifically, in a state in which the screen 490 is drawn out to the maximum, when the user further pulls the support member 492 in the +Z direction, the screen winding unit 480 winds the screen 490 into the main body housing 415 using urging force of the torsion spring (not shown in the figure).
- the publicly-known configuration e.g., the configuration described in JP-A-9-279967
- the oscillating-element-for-speaker driving unit 450 is connected to the oscillating elements 495 and transmits sound signal to the oscillating elements 495 .
- the external interface unit 470 is provided on the side 417 of the main body housing 415 and includes an interface for inputting sound and images and a button group for user operation.
- FIG. 13 is a diagram for explaining the image projection system 500 taken along A-A section in FIG. 12 .
- the first projection optical unit 440 a emits image light from the opening 416 x downward to the right.
- An emitting direction of the image light is set in advance such that a projected image (video) does not extend beyond the screen 490 in a state in which the screen 490 is unwound most.
- the screen winding unit 480 is formed in a cylindrical shape. In the example shown in FIG. 12 , a part of the screen 490 is wound by the screen winding unit 480 .
- the oscillating-element-for-speaker driving unit 450 and the screen winding unit 480 are electrically connected.
- the screen winding unit 480 and the oscillating elements 495 are electrically connected. Therefore, the oscillating-element-for-speaker driving unit 450 is electrically connected to the oscillating elements 495 via the screen winding unit 480 .
- FIG. 14 is a diagram for explaining the detailed configuration of the image projection system 500 .
- the image projection system 500 includes a control unit 460 in addition to the main body housing 415 , the projecting unit 410 (the control unit 460 , the two light source units 420 a and 420 b , the two imaging optical units 430 a and 430 b , and the two projection optical units 440 a and 440 b ), the screen 490 , the screen winding unit 480 , the oscillating-element-for-speaker driving unit 450 , and the external interface unit 470 .
- the control unit 460 includes an input interface unit 465 , a CFU 461 , a ROM 466 , and a RAM 467 .
- the input interface unit 465 converts an input sound signal or image signal into a format processable by the CPU 461 .
- a projection control program is stored in the ROM 466 .
- the CPU 461 executes the projection control program to thereby function as a main control unit 462 , two liquid crystal panel driving units (a first liquid-crystal-panel driving unit 463 a and a second liquid-crystal-panel driving unit 463 b ), and an oscillating-element-for-speaker control unit 464 .
- the main control unit 462 executes overall control of the image projection system 500 .
- the two liquid-crystal-panel driving units 463 a and 463 b respectively drive liquid crystal panels explained later.
- the oscillating-element-for-speaker control unit 464 controls the oscillating-element-for-speaker driving unit 450 . Specifically, the oscillating-element-for-speaker control unit 464 instructs the oscillating-element-for-speaker driving unit 450 what kind of sound signal should be given to the oscillating elements 495 .
- the oscillating-element-for-speaker driving unit 450 amplifies a sound signal transmitted from the oscillating-element-for-speaker control unit 464 and transmits the sound signal to the oscillating elements 495 via the screen winding unit 480 and internal wiring 496 .
- the screen winding unit 480 is connected to the oscillating elements 495 via the internal wiring 496 .
- the internal wiring 496 is arranged between the two sheets included in the screen 490 .
- the external interface unit 470 includes a user interface unit 471 , a sound signal receiving unit 472 , and an image signal receiving unit 473 .
- the user interface unit 471 includes operation buttons and an operation panel (not shown in the figure) and enables display of a menu screen and operation by the user.
- the user interface unit 471 includes an infrared interface that receives infrared input from a not-shown remote controller.
- the sound signal receiving unit 472 includes terminals for sound input (e.g., a RCA terminal and an optical digital terminal).
- the image signal receiving unit 473 includes terminals for image input (e.g., an S terminal and a D terminal). All of the user interface unit 471 , the sound signal receiving unit 472 , and the image signal receiving unit 473 are connected to the input interface unit 465 .
- the first light source unit 420 a includes a light source lamp and a reflector not shown in the figure and emits illumination light to the first imaging optical unit 430 a .
- the light source lamp for example, an ultra-high pressure mercury lamp (UHE lamp) and a light emitting diode (LED) can be adopted.
- the first imaging optical unit 430 a includes a first liquid crystal panel 432 a and modulates the illumination light into image light. Not only a liquid crystal panel but also an arbitrary light modulating device can be used. For example, a digital micro-mirror device (DMD (registered trademark)) can also be used.
- DMD digital micro-mirror device
- the first imaging optical unit 430 a includes an integrator lens, a dichroic mirror, and a dichroic prism (all of which are not shown in the figure) and transmits the image light to the first projection optical unit 440 a .
- the first projection optical unit 440 a includes a not-shown projection lens and emits the image light in a direction decided in advance (see FIG. 13 ).
- the second light source unit 420 b has a configuration same as that of the first light source unit 420 a explained above.
- the second imaging optical unit 430 b has a configuration same as that of the first imaging optical unit 430 a .
- the second projection optical unit 440 b has a configuration same as that of the first projection optical unit 440 a .
- the second imaging optical unit 430 b includes a second liquid crystal panel 432 b.
- the projecting unit 410 is equivalent to a projector in claims.
- a set including the first light source unit 420 a , the first imaging optical unit 430 a , and the first projection optical unit 440 a and a set including the second light source unit 420 b , the second imaging optical unit 430 b , and the second projection optical unit 440 b are equivalent to a projecting mechanism in claims.
- a side connected to the support member 492 and a side formed by the opening 416 z in the screen 490 are equivalent to “two opposed sides, length of which is not changed by winding and unwinding of the sheet-like screen” in claims.
- the input interface unit 465 A/D analog/digital-converts the input image signal, converts the image signal into image data of a predetermined format, and stores the image data in the RAM 467 .
- the main control unit 462 generates partial images on the basis of the image data stored in the RAM 467 and transmits the image data of the partial images to the two liquid-crystal-panel driving units 463 a and 463 b . Specifically, the main control unit 462 transmits image data of the partial image RPa ( FIG. 12 ) to the first liquid-crystal-panel driving unit 463 a and transmits image data of the partial image RPb to the second liquid-crystal-panel driving unit 463 b .
- Generation of the partial images RPa and RPb can be executed by using, for example, data of pixels in a predetermined range among the image data stored in the RAM 467 .
- the main control unit 462 In generating the image data of the partial images RPa and RPb, the main control unit 462 generates the overlapping area RPw as, for example, an image of a comb tooth shape or a mosaic shape. This allows the two partial images RPa and RPb to complement each other to form one image such that the seam thereof is not conspicuous.
- the main control unit 462 transforms the shape of an image and performs so-called keystone correction.
- the first liquid-crystal-panel driving unit 463 a drives the first liquid crystal panel 432 a on the basis of the received image data of the partial images.
- the second liquid-crystal-panel driving unit 463 b drives the second liquid crystal panel 432 b on the basis of the received image data of the partial images.
- the first liquid crystal panel 432 a modulates illumination light emitted from the first light source unit 420 a and generates image light on the basis of a signal received from the first liquid-crystal-panel driving unit 463 a .
- the first projection optical unit 440 a emits the image light and the partial image RPa ( FIG. 12 ) is shown on the screen 490 .
- the second liquid crystal panel 432 b modulates illumination light emitted from the second light source unit 420 b and generates image light on the basis of a signal received from the second liquid-crystal-panel driving unit 463 b .
- the second projection optical unit 440 b emits the image light and the partial image RPb is shown on the screen 490 .
- the image RP is zoom-adjusted in advance and focus-adjusted in advance to be shown in a predetermined size on the screen 490 unwound to the maximum.
- the input interface unit 465 A/D analog/digital-converts the input sound signal.
- the oscillating-element-for-speaker control unit 464 generates a sound signal given to the oscillating elements 495 on the basis of sound data after the digital conversion.
- the oscillating-element-for-speaker driving unit 450 transmits an electric signal for driving to the oscillating elements 495 on the basis of the sound signal generated by the oscillating-element-for-speaker control unit 464 .
- the oscillating elements 495 cause the screen 490 to oscillate on the basis of the received driving signal. In this way, sound is output from the entire screen 490 in time to the image shown on the screen 490 .
- FIGS. 15A , 15 B, 15 C, and 15 D are diagrams for explaining arrangement examples of the image projection system 500 .
- Four arrangement examples (arrangement examples 1 to 4) are respectively shown in the figures.
- the main body housing 415 is set on a wall surface such that a longitudinal direction thereof is parallel to the vertical direction.
- the setting on the wall surface can be realized by, for example, setting a support fitting (not shown in the figure) on the wall surface in advance and, in attempting to project an image (a video), attaching the main body housing 415 to the support fitting.
- the user can draw out the screen 490 sideways (in the right direction) and unwind the screen 490 .
- the unwound state of the screen 490 can be maintained by attaching the support member 492 to a hook (not shown in the figure) provided on the wall surface.
- the main body housing 415 is arranged on the wall surface such that the longitudinal direction is parallel to the horizontal direction. In the arrangement example 2, the user can slide the screen 490 downward and unwind the screen 490 .
- a method of setting the main body housing 415 in the arrangement example 2 can be the same as that in the arrangement example 1.
- the main body housing 415 is set on a floor or a desk. In the arrangement example 3, the user can draw out the screen 490 upward and unwind the screen 490 .
- a method of maintaining the unwound state of the screen 490 can be the same as that in the arrangement example 1.
- the main body housing 415 is set on a top plate of a desk 499 .
- the user can draw out the screen 490 in parallel to the top plate of the desk 499 .
- the unwound state of the screen 490 can be maintained unless the support member 492 is attached to the hook (not shown in the figure).
- the user can easily project an image by drawing out the screen 490 placing the carried image projection system 500 (the main body housing 415 ) on the desk.
- a person who views an image can view the image in the manner of looking down the screen 490 while standing around the desk.
- the projecting unit (the projector) can be arranged in the main body housing 415 and the screen 490 can be wound and housed in the main body housing 415 . Therefore, the user can easily carry the projecting unit (the projector) and the screen 490 .
- the projection optical units 440 a and 440 b are zoom-adjusted and focus-adjusted in advance such that the image RP is shown in a suitable state when the screen 490 is unwound to the maximum. Therefore, the user does not have to perform adjustment for projection. Consequently, even when the image projection system 500 (the main body housing 415 ) is arranged in various positions, the user can easily set a positional relation between the projector and the screen 490 in a suitable state simply by drawing out the screen 490 .
- the screen 490 functions as the speaker, it is possible to easily construct an environment for sound reproduction compared with a configuration in which a speaker device is prepared separately from the image projection system 500 . Since the screen 490 is caused to function as the speaker, it is possible to secure a large acoustic area and perform large-volume sound output. Since the oscillating elements 495 are arranged in the inside of the screen 490 , it is possible to make it easy to wind the screen 490 compared with a configuration in which the oscillating elements 495 are arranged on the front surface or the rear surface of the screen 490 .
- the projecting mechanisms (the two light source units 420 a and 420 b , the two imaging optical units 430 a and 430 b , and the two projection optical units 440 a and 440 b ) are arranged in a straight line, it is possible to efficiently house the projecting mechanism in the inside of the main body housing 415 .
- a large space can be secured between two image lights by arrange the projecting mechanisms to line up in a straight line. Therefore, even if a projecting distance between the main body housing 415 and the screen 490 is small, it is possible to project the image RP in a large size.
- the two projection optical units 440 a and 440 b project image lights from the same front surface W 16 . Therefore, it is possible to reduce a load on the user for aligning partial images compared with a configuration in which image lights are emitted from different surfaces.
- FIG. 16 is a diagram for explaining a schematic configuration of an image projection system in an example C2.
- An image projection system 500 a in the example C2 is different from the image projection system 500 in the example C1 ( FIG. 12 ) in that projecting units (projectors) are provided at both the ends of the screen 490 and in that an image is divided into four and projected. Otherwise, the image projection system 500 a is the same as the image projection system 500 in the example C1.
- a second main body housing 415 b that houses a second projecting unit 410 a is arranged to be opposed to the main body housing 415 (in this example, hereinafter referred to as first main body housing 415 ) across the screen 490 .
- the second projecting unit 410 a has a configuration same as that of the projecting unit 410 (in this example, hereinafter referred to as first projecting unit 410 ).
- the support member 492 is fixed in the first main body housing 145 .
- a user can unwind the screen 490 by moving the second main body housing 415 b in the +Z direction.
- the first main body housing 415 and functional units housed in the first main body housing 415 are referred to as first projection unit 550 a .
- the second main body housing 415 b and functional units housed in the second main body housing 415 b are referred to as second projection unit 550 b.
- the image projection system 500 a projects four partial images on the screen 490 and joins the partial images to project one image.
- the image projection system 500 a joins four partial images RP 1 to RP 4 to project the image RP. Processing same as that in the example C1 is applied to an overlapping area where the partial images overlap one another to prevent a seam of the partial images from becoming conspicuous.
- FIG. 17 is a diagram for explaining the detailed configuration of the first projection unit 550 a shown in FIG. 16 .
- the first projection unit 550 a is different from the image projection system 500 in the example C1 ( FIG. 14 ) in that a signal line 498 is embedded in the inside of the screen 490 and in that the signal line 498 is connected to the CPU 461 via the screen winding unit 480 . Otherwise, the first projection unit 550 a is the same as the image projection system 500 .
- the signal line 498 mediates exchange of signals between the first projection unit 550 a and the second projection unit 550 b.
- FIG. 18 is a diagram for explaining the detailed configuration of the second projection unit 550 b shown in FIG. 16 .
- the second projection unit 550 b is different from the first projection unit 550 a ( FIG. 17 ) in seven points explained below. Otherwise, the second projection unit 550 b is the same as the first projection unit 550 a .
- the second projection unit 550 b does not include the external interface unit 470 , does not include the input interface unit 465 , does not include the oscillating-element-for-speaker driving unit 450 , does not include the oscillating-element-for-speaker control unit 464 , does not include the internal wiring 496 and the second projection unit 550 b includes the support member 492 as explained above and includes a sub-control unit 462 a instead of the main control unit 462 .
- the second projection unit 550 b includes a third light source unit 421 a corresponding to the first light source unit 420 a in the first projection unit 550 a .
- the second projection unit 550 b includes a third imaging optical unit 431 a corresponding to the first imaging optical unit 430 a , a third liquid crystal panel 433 a corresponding to the first liquid crystal panel 432 a , a third projection optical unit 441 a corresponding to the first projection optical unit 440 a , a fourth light source unit 421 b corresponding to the second light source unit 420 b , a fourth imaging optical unit 431 b corresponding to the second imaging optical unit 430 b , a fourth liquid crystal panel 433 b corresponding to the second liquid crystal panel 432 b , and a fourth projection optical unit 441 b corresponding to the second projection optical unit 440 b.
- a control unit 485 includes a CPU 486 , a ROM 468 , and a RAM 469 .
- the CPU 486 executes a program for projection control stored in the ROM 468 to thereby function as a sub-control unit 462 a , a third liquid-crystal-panel driving unit 464 a , and a fourth liquid-crystal-panel driving unit 464 b .
- the signal line 498 is connected to the CPU 486 via the support member 492 .
- the sub-control unit 462 a executes overall control of the second projection unit 550 b . However, the main control unit 462 in the first projection unit 550 a generates image (video) data. The sub-control unit 462 a receives the image (video) data from the main control unit 462 via the signal line 498 and supplies the image (video) data to the two liquid-crystal-panel driving units 464 a and 464 b.
- the image projection system 500 a in the example C2 explained above realizes effects same as those of the image projection system 500 in the example C1. Since the image RP is divided into four and projected by using the four projecting mechanisms, even when a distance between the screen 490 and each of the projection optical units 440 a , 440 b , 441 a , and 441 b is small, it is possible to show the image RP in a large size.
- FIG. 19 is a diagram for explaining a schematic configuration of an image projection system in an example C3.
- An image projection system 500 b in the example C3 is different from the image projection system 500 ( FIG. 12 ) in a setting position of oscillating elements for a speaker. Otherwise, the image projection system 500 b is the same as the image projection system 500 in the example C1.
- the image projection system 500 b does not include the oscillating elements 495 in the inside of a screen 490 a . Therefore, the screen 490 a is formed by one sheet.
- the image projection system 500 b includes an acoustic unit 497 in the inside of the main body housing 415 .
- the acoustic unit 497 includes a speaker cone, oscillation elements for a speaker, and a voice coil (all of which are not shown in the figure).
- the acoustic unit 497 outputs sound according to an input electric signal from the oscillation-element-for-speaker driving unit 450 .
- An opening 416 u for a speaker is provided in the front surface W 16 of the main body housing 415 in addition to the three openings 416 x , 416 y , and 416 z.
- FIG. 20 is a diagram for explaining the image projection system 500 b taken along B-B section in FIG. 19 .
- the screen 490 a functions as a part of a speaker. Specifically, the acoustic unit 497 outputs sound downward to the right. The screen 490 a reflects the sound output from the acoustic unit 497 and outputs the sound to a viewer.
- the image projection system 500 b in the example C3 explained above realizes effects same as the image projection system 500 in the example C1. Since oscillating elements are not embedded in the screen 490 a , the diameter of the screen 490 a can be reduced when the screen 490 a is wound. Therefore, it is possible to reduce a space for housing the screen 490 a in the main body housing 415 and reduce the size of the entire image projection system 500 b.
- FIG. 21 is a diagram for explaining a schematic configuration of an image projection system in an example C4.
- An image projection system 500 c in the example C4 is different from the image projection system 500 ( FIG. 12 ) in that a surface from which light is emitted among the surfaces of the main body housing 415 is the top surface. Otherwise, the image projection system 500 c is the same as the image projection system 500 in the example C1.
- the first projection optical unit 440 a in the example C4 is configured by rotating the first projection optical unit 440 a in the image projection system 500 in the example C1 ( FIG. 12 ) 90 degrees with an X axis as a rotation axis.
- the second projection optical unit 440 b in the example C4 is configured by rotating the second projection optical unit 440 b in the image projection system 500 in the example C1 ( FIG. 12 ) 90 degrees with the X axis as the rotation axis.
- Two openings 418 a and 418 b for emitting image light are provided in a top surface W 18 of the main body housing 415 .
- Two projection mirrors 419 a and 419 b are provided in the main body housing 415 .
- the projection mirror 419 a has a rectangular shape and the rear surface of the projection mirror 419 a is formed as a mirror.
- the lower side of the projection mirror 419 a is set in contact with one side (a side parallel to the X axis) of the opening 418 a .
- the projection mirror 419 a is attached to the main body housing 415 to be rotatable with the lower side as an axis.
- a user can reflect image light using the mirror of the rear surface by lifting the projection mirror 419 a .
- the user can close the opening 418 a using the projection mirror 419 a by pushing up the projection mirror 419 a to be parallel to the top surface W 18 .
- the projection mirror 419 b has a configuration same as that of the
- image light emitted upward from the first projection optical unit 440 a is reflected by the projection mirror 419 a and travels to the screen 490 .
- the partial image RPb is shown on the screen 490 by the image light.
- image light emitted upward from the second projection optical unit 440 b is reflected by the projection mirror 419 b and travels to the screen 490 .
- the partial image RPa is shown on the screen 490 by the image light.
- the image projection system 500 c in the example C4 explained above realizes effects same as those of the image projection system 500 in the example C1.
- the image lights emitted from the two projection optical units 440 a and 440 b are reflected by using the two projection mirrors 419 a and 419 b and caused to travel to the screen 490 . Therefore, it is possible to increase a projection distance of the image lights (an optical distance from the two projection optical units 440 a and 440 b to the screen 490 ) and show a larger image (video) on the screen 490 .
- the total number of oscillating elements 495 is eighteen. However, the number can be an arbitrary number.
- the image projection system 500 can adopt a configuration including no oscillating element 495 . Even in such a configuration, since the screen 490 is wound and housed in the inside of the main body housing 415 , the user can easily carry the projecting unit (the projector) and the screen 490 . The user does not have to perform adjustment for projecting an image (a video) in a suitable state (size and focus).
- the oscillating elements 495 are arranged in the inside of the screen 490 .
- the oscillating elements 495 can also be arranged on the front surface or the rear surface of the screen 490 .
- the oscillating elements 495 are arranged in the area where the image RP is shown.
- the oscillating elements 495 can also be arranged in other areas.
- the oscillating elements 495 can also be arranged in a margin area where the image RP is not shown in an area exposed by unwinding in the screen 490 .
- a relatively large oscillating element (an actuator that oscillates the entire screen 490 ) can also be arranged in an area of the screen 490 unwound in the inside of the main body housing 415 . Even in such a configuration, it is possible to cause the entire screen 490 to function as a speaker.
- the image projection system of the invention can adopt an arbitrary screen functioning as a speaker employing oscillating elements.
- the number of projecting units is one (the examples C1, C3, and C4) or two (the example C2).
- the number of projecting units is not limited to this and can be an arbitrary number.
- the image projection system of the invention can adopt a configuration including an arbitrary number of projectors.
- the number of projecting mechanisms included in each of the projecting units can also be an arbitrary number.
- configuration for projecting an image without dividing the image can be adopted.
- the projecting unit includes plural projecting mechanisms, an image can be projected without being divided. In this case, it is possible to emit image lights of different images from the projecting mechanisms and project plural images (videos).
- the first projection unit 550 a and the second projection unit 550 b include the same number of (one) projecting unit (projector). However, instead, the first projection unit 550 a and the second projection unit 550 b can respectively include different numbers of projecting units.
- the first projection unit 550 a can include one projecting unit and the second projection unit 550 b can include two projecting units.
- the image projection system of the invention can adopt an arbitrary configuration in which plural projecting units (projectors) are provided, the plural projecting units are arranged in a distributed manner on two opposed sides, length of which is not changed by winding or unwinding, in an unwound area (a projection area) in the screen.
- the two projection optical units 440 a and 440 b ( 441 a and 441 b ) emit image lights from the same surface.
- the projection optical units 440 a and 440 b ( 441 a and 441 b ) can also emit image lights from different surfaces.
- the projecting unit 410 ( 410 a ) includes the two light source units 420 a and 420 b ( 421 a and 421 b ).
- the projecting unit 410 ( 410 a ) can also include one light source unit. In this case, illumination light emitted by the one light source unit can be distributed to the first imaging optical unit 430 a and the second imaging optical unit 430 b by using a prism or an optical fiber.
- the projecting mechanisms (the light source units, the imaging optical units, and the projection optical units) are arranged to line up in a straight line.
- an arrangement form of the projecting mechanisms is not limited to this.
- the projecting mechanisms can adopt an arbitrary arrangement form.
- the functional units included in the projecting mechanisms can also be arranged in a lattice shape in which vertical columns and horizontal columns cross each other.
- the projection optical units 440 a and 440 b ( 441 a and 441 b ) perform zoom adjustment and focus adjustment to show, in a predetermined size, the image RP on the screen 490 unwound to the maximum.
- the invention is not limited to this.
- the screen 490 is configured to maintain a state of being unwound in an arbitrary position.
- the screen winding unit 480 is configured to detect the length (the length in the Z direction) of the screen 490 let out by the unwinding and notify the main control unit 462 of the length.
- the main control unit 462 is configured to adjust the size and the aspect ratio of an image and perform focus adjustment on the basis of the notified let-out amount of the screen 490 .
- a correspondence relation between the led-out amount of the screen 490 and suitable size and aspect ratio of the image and a relation between the let-out amount of the screen 490 and a suitable focus adjustment amount are calculated by experiments in advance and stored in the ROM 466 as a table.
- the main control unit 462 can also be configured to determine, with the notified let-out amount of the screen 490 as a key, the size, the aspect ratio, and the focus adjustment amount of the image referring to the table.
- the sheet on the side on which an image (a video) is projected is formed as the diffusion screen, the surface of which is processed into the white mat.
- the sheet can also be formed as other types of screens.
- the sheet can also be formed as a diffusion screen, the surface of which is processed into a gray mat or a white recursive screen, the surface of which is inlaid with beads.
- the screens 490 and 490 a are automatically wound by the torsion spring included in the screen winding unit 480 .
- the screens 490 and 490 a can also be manually wound.
- the screen winding unit 480 can also include a handle for winding the screens 490 and 490 a .
- the handle for screen winding is equivalent to a screen winding unit in claims.
- the projection area of the rectangular shape in the unwound state is formed in the screen 490 .
- the shape of the projection area is not limited to the rectangular shape and can be formed in an arbitrary shape.
- the image projection systems 500 and 500 a to 500 c output sound while projecting an image.
- the image projection systems 500 and 500 a to 500 c can be configured to project an image (a still image) and not to output sound.
- the overlapping area is provided in the generation of the partial images RPa and RPb (RP 1 to RP 4 ).
- a part of the configuration realized by hardware may be replaced with software.
- a part of the configuration realized by software may be replaced with hardware.
- FIG. 22 is a diagram for explaining a state in which a projector 710 attached to a stand 760 is set.
- FIG. 23 is a diagram for explaining a state in which the projector 710 attached to the stand 760 is carried.
- a projector system 701 includes the projector 710 , the stand 760 , and a screen 780 .
- the projector 710 of the projector system 701 is set on the stand 760 and projects the image RP on the screen 780 .
- the screen 780 of the projector system 701 is a plane on which the image RP is displayed.
- the screen 780 may be a movie screen or may be a wall surface.
- the projector 710 includes a main body housing 750 that houses various components of the projector 710 .
- the main body housing 750 is integrally connected to the stand 760 .
- the main body housing 750 of the projector 710 has a substantially square pole shape.
- the image RP is projected on the screen 780 in a state in which the square pole lies sideways. The detailed configuration of the projector 710 is explained later.
- the stand 760 of the projector system 701 can be transformed into a setting form and a carrying form.
- the stand 760 functions as a projector table on which the projector 710 is set.
- the stand 760 functions as a carrying device for carrying the projector 710 .
- the stand 760 includes a pedestal 610 on which the projector 710 is installed, a first support leg 620 that supports the pedestal 610 , a handle 630 provided in the first support leg 620 , a second support leg 640 that supports the pedestal 610 in cooperation with the first support leg 620 , and wheels 650 provided in the second support leg 640 .
- the first support leg 620 and the second support leg 640 are connected to be foldable to the pedestal 610 .
- the first support leg 620 and the second support leg 640 are fixed in a state drawn out from the pedestal 610 , the first support leg 620 is set in contact with the ground via the handle 630 to support the pedestal 610 , and the second support leg 640 is set in contact with the ground via the wheels 650 to support the pedestal 610 .
- the first support leg 620 and the second support leg 640 are fixed in a state folded to the pedestal 610 and the handle 630 and the wheels 650 project from the pedestal 610 . In a state in which the stand 760 is transformed into the carrying form, it is possible to carry the projector 710 by gripping the handle 630 and tugging the stand 760 while keeping the wheels 650 set in contact with the ground.
- FIG. 24 is a diagram for explaining the detailed configuration of the stand 760 in the setting form viewed from a direction opposed to the screen 780 .
- FIG. 25 is a diagram for mainly explaining the detailed configuration of the stand 760 transformed from the state shown in FIG. 24 into the carrying form.
- FIG. 26 is a diagram for explaining the detailed configuration of the stand 760 in the carrying form shown in FIG. 25 viewed from a floor surface FS.
- the pedestal 610 of the stand 760 is fixed to the main body housing 750 of the projector 710 by screws 618 .
- the pedestal 610 has a shape matching the main body housing 750 of the projector 710 .
- the pedestal 610 has a substantially rectangular shape including long side surfaces 611 and 612 and short side surfaces 613 and 614 .
- the first support leg 620 is rotatably connected to the short side surface 614 side in the pedestal 610 via a connecting shaft 622 substantially parallel to the short side surfaces 613 and 614 .
- the second support leg 640 is rotatably connected to the short side surface 613 side opposed to the short side surface 614 via a connecting shaft 642 substantially parallel to the short side surfaces 613 and 614 .
- the first support leg 620 and the second support leg 640 of the stand 760 rise from the floor surface FS and support the pedestal 610 in cooperation with each other.
- the first support leg 620 is a columnar member, at one end of which the handle 630 is formed. The end on the opposite side of the handle 630 is rotatably connected to the pedestal 610 via the connecting shaft 622 .
- the first support leg 620 is foldable to the connecting shaft 642 , which is a second connecting unit, generally along the long side surfaces 611 and 612 in a longitudinal direction of the pedestal 610 .
- the second support leg 640 is a structure formed by connecting two columnar members at ends thereof.
- the wheels 650 are formed at one end of the second support leg 640 .
- the end on the opposite side of the wheels 650 is rotatably connected to the pedestal 610 via the connecting shaft 642 .
- the second support leg 640 is foldable to the connecting shaft 622 , which is a first connecting unit, generally along the long side surfaces 611 and 612 in the longitudinal direction of the pedestal 610 .
- the first support leg 620 and the second support leg 640 cross each other in both the setting form and the carrying form in a state in which the columnar member of the first support leg 620 is held between the two columnar members in the second support leg 640 .
- a fixing pin 626 projecting to the second support leg 640 is formed in a region where the first support leg 620 crosses the second support leg 640 in the setting form.
- a fixing groove 646 that fits with the fixing pin 626 of the first support leg 620 is formed in a region where the second support leg 640 crosses the first support leg 620 in the setting form.
- the handle 630 of the stand 760 comes into contact with the floor surface FS when the pedestal 610 is supported in the setting form.
- the handle 630 projects from the short side surface 613 in the pedestal 610 in a state in which the first support leg 620 is folded in the carrying form.
- the handle 630 has a bar-like section 632 having thickness that a human can grip by hand.
- the handle 630 is a square frame member.
- the handle 630 may be other polygonal and circular frame members or may be a T-shaped frame member.
- the bar-like section 632 of the handle 630 is formed substantially parallel to the short side surfaces 613 and 614 of the pedestal 610 .
- the wheels 650 of the stand 760 come into contact with the floor surface FS when the pedestal 610 is supported in the setting form. As shown in FIGS. 25 and 26 , the wheels 650 project from the short side surface 614 in the pedestal 610 in a state in which the second support leg 640 is folded in the carrying form.
- the wheels 650 have a wheel shaft 652 that rotatably connects the wheels 650 to the second support leg 640 .
- the wheel shaft 652 of the wheels 650 is provided substantially parallel to the short side surfaces 613 and 614 of the pedestal 610 and is also substantially parallel to the bar-like section 632 of the handle 630 .
- FIG. 27 is a diagram for mainly explaining an external configuration of the projector 710 .
- the projector 710 includes light source units 720 a and 720 b that radiate light, imaging optical units 730 a and 730 b that generate projection lights representing the image RP, and projecting units 740 a and 740 b that project the projection lights representing the image RP on the screen 780 .
- the light source units 720 a and 720 b of the projector 710 include ultra-high pressure mercury lamps (UHF lamps) as light sources.
- the light source units 720 a and 720 b may include light emitting diodes (LEDs) as light sources instead of the ultra-high pressure mercury lamps.
- the imaging optical units 730 a and 730 b of the projector 710 are color separating and combining optical units.
- the imaging optical units 730 a and 730 b separate light radiated by the light source units 720 a and 720 b into red light, green light, and blue light, modulates the respective lights, and then combines these lights as one light again to thereby generate projection light.
- spatial light modulators that modulate light in the imaging optical units 730 a and 730 b are transmissive liquid crystal panels that modulate transmitted light.
- a reflective liquid crystal panel that modulates reflective light may be used or a micro-mirror type light modulating device such as a digital micro-mirror device (DMD (registered trademark)) may be used.
- DMD digital micro-mirror device
- the projecting units 740 a and 740 b of the projector 710 include projection lens units in which plural lenses such as a front lens, a zoom lens, a master lens, and a focus lens are arrayed.
- the projecting units 740 a and 740 b may be optical units that reflect projection lights generated by the imaging optical units 730 a and 730 b to the screen 780 using at least one of an aspherical lens, a magnifying lens, a diffusion glass, an aspherical mirror, and a reflection mirror.
- the image RP projected by the projector 710 is an image formed by joining the two partial images RPa and RPb.
- the overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in the seam of the partial image RPa and the partial image RPb.
- the partial image RPa in the image RP is projected by using the light source unit 720 a , the imaging optical unit 730 a , and the projecting unit 740 a .
- light radiated from the light source unit 720 a is projected on the screen 780 from the projecting unit 740 a after being modulated into projection light representing the partial image RPa by the imaging optical unit 730 a .
- the partial image RPb in the image RP is projected by using the light source unit 720 b , the imaging optical unit 730 b , and the projecting unit 740 b .
- light radiated from the light source unit 720 b is projected on the screen 780 from the projecting unit 740 b after being modulated into projection light representing the partial image RPb by the imaging optical unit 730 b.
- the main body housing 750 of the projector 710 houses the light source units 720 a and 720 b , the imaging optical units 730 a and 730 b , and the projecting units 740 a and 740 b .
- the main body housing 750 is a hexahedron. Outer surfaces forming the hexahedron include a top surface 751 , a bottom surface 752 , a front surface 753 , a back surface 754 , a left side 755 , and a right side 756 .
- the top surface 751 of the main body housing 750 is an upper end located in an upper part in the main body housing 750 .
- the bottom surface 752 of the main body housing 750 is a bottom end as a surface opposed to the top surface 751 .
- the front surface 753 of the main body housing 750 is a front end facing the screen 780 in the main body housing 750 .
- the back surface 754 of the main body housing 750 is a surface opposed to the front surface 753 and is a rear end with the back thereof facing the screen 780 in the main body housing 750 .
- the left side 755 of the main body housing 750 is a side end located on the left side in front of the screen 780 .
- the right side 756 of the main body housing 750 is a side end located on the right side in front of the screen 780 .
- the top surface 751 , the bottom surface 752 , the front surface 753 , and the back surface 754 of the main body housing 750 are rectangles having long sides extending from the left side 755 to the right side 756 .
- the projecting unit 740 b , the imaging optical unit 730 b , the light source unit 720 b , the light source unit 720 a , the imaging optical unit 730 a , and the projecting unit 740 a line up substantially in a straight line in this order from the left side 755 to the right side 756 of the main body housing 750 .
- the stand 760 is attached to the bottom surface 752 of the main body housing 750 .
- openings 749 a and 749 b for exposing the projecting units 740 a and 740 b to the outside of the main body housing 750 are provided such that projection lights from the projecting units 740 a and 740 b reach the screen 780 .
- the main body housing 750 houses the entire projecting units 740 a and 740 b .
- the main body housing 750 may house the projecting units 740 a and 740 b with a part thereof projecting from the openings 749 a and 749 b .
- both the openings 749 a and 749 b are provided in the top surface 751 of the main body housing 750 .
- the projecting units 740 a and 740 b are also provided on the top surface 751 as the same plane in the main body housing 750 .
- the projector 710 further includes a user interface 791 and an image input unit 792 .
- the user interface 791 of the projector 710 receives instruction input from a user of the projector 710 .
- the user interface 791 includes, in addition to plural buttons for receiving pressing input from the user, an infrared interface that receives infrared input from a remote controller.
- the image input unit 792 of the projector 710 is connected to an external apparatus such as a personal computer and a digital image camera and receives the input of image data representing the image RP projected on the screen 780 .
- the first support leg 620 and the second support leg 640 are foldable generally along the longitudinal direction of the pedestal 610 .
- the handle 630 projects from the short side surface 613 at one end in the longitudinal direction of the pedestal 610 .
- the wheels 650 project from the short side surface 614 at an end on the opposite side of the short side surface 613 in the longitudinal direction of the pedestal 610 .
- This makes it possible to secure sufficient height from the floor surface FS to the projector 710 in drawing out the first support leg 620 and the second support leg 640 from the pedestal 610 to set the projector 710 . Further, this makes it possible to secure sufficient length from the wheels 650 to the handle 630 in folding the first support leg 620 and the second support leg 640 to the pedestal 610 to carry the projector 710 .
- the first support leg 620 is foldable to the connecting shaft 642 that connects the second support leg 640 to the pedestal 610 .
- the second support leg 640 is foldable to the connecting shaft 622 that connects the first support leg 620 to the pedestal 610 . This makes it possible to reduce a load applied to the connecting shafts 622 and 642 in folding the first support leg 620 and the second support leg 640 to the pedestal 610 to carry the projector 710 .
- the handle 630 has the bar-like section 632 substantially parallel to the wheel shaft 652 connected to the wheels 650 . This makes it possible to bring the bar-like section 632 into contact with the floor surface FS to halt the rotation of the wheels 650 in drawing out the first support leg 620 and the second support leg 640 from the pedestal 610 to set the projector 710 . Further, this makes it possible to grip the bar-like section 632 and easily tug the projector 710 in folding the first support leg 620 and the second support leg 640 to the pedestal 610 to carry the projector 710 .
- FIG. 28 is a diagram for mainly explaining the detailed configuration of a stand 761 in the setting form in a first modification viewed from the direction opposed to the screen 780 .
- the stand 761 in the first modification is the same as the stand 760 except that a mechanism for fixing the first support leg 620 and the second support leg 640 in the setting form is different.
- plural position fixing holes 628 and 648 are respectively formed in positions corresponding to each other in the first support leg 620 and the second support leg 640 .
- the first support leg 620 and the second support leg 640 can be fixed in multiple stages by inserting position fixing pins 660 into one position fixing hole 628 and one position fixing hole 648 corresponding to each other among the plural position fixing holes 628 and 648 .
- the plural position fixing holes 628 and 648 and the position fixing pins 660 configure a position fixing unit that fixes, in multiple stages, positions in which the handle 630 and the wheels 650 are set farther away from the pedestal 610 stepwise.
- the first support leg 620 and the second support leg 640 can be fixed in five stages. However, the number of stages for fixing the first support leg 620 and the second support leg 640 only has to be equal to or larger than two and is not limited to five.
- FIG. 29 is a diagram for mainly explaining the detailed configuration of a stand 762 in the setting form in a second modification viewed from the direction opposed to the screen 780 .
- the stand 762 in the second modification is the same as the stand 760 except that a mechanism for attaching the projector 710 to the pedestal 610 is different.
- the stand 762 in the second modification includes a rotary dial 672 , an elevating screw 674 , and an elevation guide 678 .
- the rotary dial 672 of the stand 762 is connected to the elevating screw 674 .
- the elevating screw 674 of the stand 762 is rotatably provided in the pedestal 610 .
- the main body housing 750 of the projector 710 is attached to a screw section of the elevating screw 674 .
- the elevation guide 678 of the stand 762 prevents positional deviation of the main body housing 750 of the projector 710 and the pedestal 610 .
- the elevating screw 674 rotates and the main body housing 750 of the projector 710 moves up and down relatively to the pedestal 610 .
- the rotary dial 672 , the elevating screw 674 , and the elevation guide 678 configure a height adjusting unit that adjusts height at which the projector 710 is installed on the pedestal 610 .
- FIG. 30 is a diagram for explaining the handle 630 in another embodiment.
- the bar-like section 632 of the handle 630 shown in FIG. 30 is covered with a non-slip member 638 .
- the pedestal 610 , the first support leg 620 , and the second support leg 640 in the stand 760 are made of metal.
- the non-slip member 638 is formed of a material having a coefficient of friction higher than that of a metal surface.
- the non-slip member 638 is formed of elastomer resin such as rubber or thermoplastic elastomer.
- the stand 760 may include a stopper that halts the rotation of the wheels 650 . This makes it possible to easily perform work for transforming the stand 760 between the setting form and the carrying form and prevent the stand 760 from shifting from the floor surface FS in the setting form.
- the wheel shaft 652 of the wheels 650 may be provided to cross the bar-like section 632 of the handle 630 rather than being provided substantially in parallel to the bar-like section 632 of the handle 630 .
- the fixing of the first support leg 620 and the second support leg 640 is not limited to the mechanism for fitting pins in grooves or holes. Other well-known mechanisms employing a spring and an engaging member may be used.
- the wheels 650 may be provided in the first support leg 620 and the handle 630 may be provided in the second support leg 640 .
- the projector 710 attached to the stand 760 is not limited to the projector including the two projecting units.
- the projector 710 may be a projector including one projecting unit or may be a projector including three or more projecting units.
- FIG. 31 is a schematic diagram for explaining the configuration of a projector 900 .
- the projector 900 includes a projector main body 810 , a first connecting unit 830 , and a second connecting unit 840 and assumes a substantially square columnar shape as a whole.
- the projector main body 810 includes an image processing unit (not shown in the figure), an illumination optical unit (not shown in the figure), a liquid crystal panel (not shown in the figure), a projection optical unit 821 , and the like and a housing (explained later) that houses the foregoing therein.
- the projector main body 810 generates, on the basis of image data input from a personal computer, an optical disk player, or the like, image light representing an image indicated by the image data.
- the projector main body 810 projects the image lights on a projection surface and displays the image on the projection surface.
- the first connecting unit 830 and the second connecting unit 840 fix a distance and a tilt (i.e., a positional relation) between the projectors 900 adjacent to each other.
- the first connecting unit 830 and the second connecting unit 840 are detachably attachable to the projector main body 810 .
- FIG. 32 is a schematic diagram of a state in which the first connecting unit 830 and the second connecting unit 840 are removed from the projector main body 810 .
- a housing 822 included in the projector main body 810 includes a fitting section 823 and a fitting section 827 at both the ends thereof.
- An external shape of the housing 822 is a substantial rectangular parallelepiped shape.
- the fitting section 823 fits with the first connecting unit 830 .
- the fitting section 823 has projections 824 for maintaining a state of fitting with the first connecting unit 830 .
- the projections 824 are configured to recess when pressed and return to the original state (project) when pressing force stops being applied.
- the projections 824 fit in through holes for fixing 833 (explained later) of the first connecting unit 830 .
- the first connecting unit 830 is attached to the projector main body 810 and fixed.
- the fitting section 827 fits with the second connecting unit 840 .
- the fitting section 827 has projections 828 for maintaining a state of fitting with the second connecting unit 840 . Therefore, when the fitting section 827 is inserted in the second connecting unit 840 , the projections 828 fit in through holes for fixing 843 (explained later) of the second connecting unit 840 .
- the second connecting unit 840 is attached to the projector main body 810 and fixed.
- the first connecting unit 830 includes a cylindrical unit 832 and a fitting section 836 .
- the cylindrical unit 832 assumes a substantially square cylindrical shape.
- One end of the cylindrical unit 832 is opened and the other end thereof is sealed by a sealing unit 835 .
- Exhaust ports 834 for discharging the air, which is discharged from the projector main body 810 , to the outside of the projector 900 are provided in the cylindrical unit 832 .
- the exhaust ports 834 are provided in all surfaces (four surfaces) of the cylindrical unit 832 that assumes the substantially square cylindrical shape.
- the through holes for fixing 833 for fixing At the opened one end of the cylindrical unit 832 , the through holes for fixing 833 for fixing a state of fixing of the projector main body 810 with the fitting section 823 are provided. As explained above, the projections 824 of the projector main body 810 are fit in the through holes for fixing 833 .
- the fitting section 836 fits with the second connecting unit 840 of another projector.
- the fitting section 836 has projections 837 for fixing a state of fitting with the second connecting unit 840 .
- the projections 837 have structure same as that of the projections 824 of the projector main body 810 .
- the second connecting unit 840 assumes a substantially square cylindrical shape same as that of the cylindrical unit 832 . Both the ends of the second connecting unit 840 are opened. Inlet ports 844 for supplying the air to the projector main body 810 are provided in the second connecting unit 840 . The inlet ports 844 are provided in all surfaces (four surfaces) of the second connecting unit 840 that assumes the substantially square cylindrical shape.
- Through holes for fixing 843 for maintaining a state of fitting of the projector main body 810 with the fitting section 827 are provided at one end of the second connecting unit 840 .
- the projections 824 of the projector main body 810 are fit in the through holes for fixing 843 .
- through holes for fixing 846 for maintaining a state of fitting of the other projector with the first connecting unit 830 is provided at the other end of the second connecting unit 840 .
- the first connecting unit 830 and the second connecting unit 840 assume the substantially square cylindrical shape.
- the first connecting unit 830 and the second connected unit 840 change to a shape formed by extending the housing 822 , which assumes the substantially rectangular parallelepiped shape, in a longitudinal direction thereof.
- the projector 900 assumes a substantially square cylindrical shape as a whole.
- each of the projections 824 and 828 are configured to recess when pressed and return to the original state (project) when pressing force stops being applied. Therefore, in attaching the first connecting unit 830 and the second connecting unit 840 to the projector main body 810 , it is possible to easily attach the first connecting unit 830 and the second connecting unit 840 simply by inserting the fitting section 823 and the fitting section 827 in the first connecting unit 830 and the second connecting unit 840 , respectively.
- the first connecting unit 830 includes the fitting section 836 that fit with the second connecting unit 840 of another projector and the projections 837 .
- the second connecting unit 840 has the through holes for fixing 846 in which the projections 837 of the other projector fit. Therefore, when two projectors 900 (e.g., a first projector 900 A and a second projector 900 B) are connected, the fitting section 836 of the second projector 900 B is inserted into the second connecting unit 840 of the first projector 900 A. Then, the projections 837 of the second projector 900 B fit in the through holes for fixing 846 of the second connecting unit 840 of the first projector 900 A.
- the first connecting unit 830 of the second projector 900 B and the second connecting unit 840 of the first projector 900 A are connected. As a result, the first projector 900 A and the second projector 900 B are connected.
- FIG. 33 is a diagram for explaining a connection process for three projectors 900 .
- the three projectors 900 are the same projectors.
- the projector 900 shown on the left side on the paper surface is referred to as projector 900 A
- the projector 900 shown in the center is referred to as projector 900 B
- the projector 900 shown on the right side is referred to as projector 900 C.
- projector main bodies 810 , the first connecting units 830 , and the second connecting units 840 included in the projectors 900 are referred to with A, B, and C affixed to the ends of the reference numerals.
- the projections 837 are configured to recess when pressed and return to the original state (project) when pressing force stops being applied. Therefore, as shown in FIG. 33 , it is possible to easily connect the first projector 900 A and the second projector 900 B simply by inserting the fitting section 836 A of the second projector 900 E into the second connecting unit 840 A of the first projector 900 A. Similarly, it is possible to easily connect the second projector 900 E and the third projector 900 C simply by inserting the fitting section into the connecting section. In this way, the first projector 900 A, the second projector 900 B, and the third projector 900 C are easily connected.
- the first projector 900 A, the second projector 900 B, and the third projector 900 C are the same projectors.
- the length of the first connecting units 830 B and 830 C and the second connecting units 840 A and 840 E are fixed. Therefore, a distance between the projector main body 810 A and the projector main body 810 E and a distance between the projector main body 810 E and the projector main body 8100 are the same.
- the projectors 900 A, 900 B, and 900 C assume the substantially square cylindrical shape and are connected. Therefore, the projectors 900 A, 900 B, and 900 C can be stably set without causing a tilt with respect to a setting surface. As a result, fluctuation in a tilt relatively less easily occurs among the projector main bodies 810 A, 810 B, and 810 C. In other words, the first projector 900 A, the second projector 900 B, and the third projector 900 C are accurately connected.
- FIG. 34 is an enlarged diagram of an X section in FIG. 33 .
- Wiring 831 B is applied to the first connecting unit 8308 of the second projector 900 E in order to electrically connect the second projector 900 E to the first projector 900 A.
- Wiring (not shown in the figure) is also applied to the second connecting unit 840 of the first projector 900 A in order to electrically connect the first projector 900 A to the second projector 900 B. Therefore, when the first projector 900 A and the second projector 900 B are connected via the second connecting unit 840 A and the first connecting unit 830 B, the first projector 900 A and the second projector 900 B are electrically connected.
- first projector 900 A and the second projector 900 B are connected by using a separate cable, image data, control signals, and the like can be communicated between the first projector 900 A and the second projector 900 B.
- the first projector 900 A can be connected to a commercial power supply to supply power to the second projector 900 E via the projector main body 810 A.
- the third projector 9000 the first projector 900 A, the second projector 900 B, and the third projector 900 C are electrically connected as well.
- FIG. 35 is a diagram for explaining a flow of the air flowing through the three projectors 900 when the projectors 900 are connected and used.
- the projector main body 810 B includes, in the inside of a housing 822 , an exhaust fan 829 for drawing out the air.
- the first connecting unit 830 B of the second projector 900 B includes a sealing unit 835 B at an end on a side connected to the second connecting unit 840 A of the first projector 900 A.
- the first connecting unit 830 C of the third projector 900 C includes a sealing unit 835 C.
- both the ends of the second projector 900 B are sealed by the sealing unit 835 B of the first connecting unit 830 B and the sealing unit 835 C of the first connecting unit 830 C included in the third projector 900 C.
- the air is led into the projector main body 810 via the inlet ports 844 of the second connecting unit 840 B during operation of the exhaust fan 829 .
- the air led into the projector main body 810 E passes through the projector main body 810 B while depriving the heat of heat generating components in the projector main body 810 B.
- the air is discharged to the outside of the second projector 900 E via the exhaust ports 834 of the first connecting unit 830 B.
- the second projector 900 E and the first projector 900 A are separated by the sealing unit 835 B. Therefore, it is less likely that the air warmed in the projector main body 810 B is led into the projector main body 810 A through the first connecting unit 830 E and the second connecting unit 840 A of the first projector 900 A. As a result, it is possible to reduce the likelihood that the first projector 900 A is heated by the exhaust of the second projector 900 B and the components in the projector main body 810 E fail because of overheating.
- FIG. 36 is a diagram of an example in which the three projectors 900 are connected and used.
- the first projector 900 A, the second projector 900 B, and the third projector 900 C are linearly connected as shown in FIG. 33 to configure a projector system 910 .
- the first projector 900 A displays a first image IG 1
- the second projector 900 B displays a second image IG 2
- the third projector 900 C displays a third image IG 3 .
- a horizontally-long image IG is displayed on the screen SC.
- Image data representing an image to be displayed on the screen SC is supplied, for example, from a not-shown personal computer to the first projector 900 A.
- the first projector 900 A recognizes that the three projectors 900 are connected, generates divided data obtained by dividing the image represented by the input image data, and transfers the divided data to the second projector 900 B and the third projector 900 C.
- a dedicated shelf is prepared and the plural projectors are placed on the shelf. Since the dedicated shelf is huge, it is very hard to set the shelf. When the projectors are placed on the dedicated shelf, the projectors have to be accurately arranged with distances, tilts, and the like among the projectors fixed. Therefore, work is complicated and consumes labor and time.
- the projector 900 in this example includes the first connecting unit 830 and the second connecting unit 840 . Therefore, if the plural projectors 900 are prepared, it is possible to easily connect the plural projectors 900 unless a shelf and instruments are used besides the projectors 900 .
- FPD Full Panel Display
- plural FPDs are arranged to display the image. Therefore, a viewer may feel that seams among the FPDs are disturbing.
- the plural projectors 900 in this example are connected to display a large-area image, as a projection surface such as a screen or a wall surface, a large projection surface without a seam can be used.
- FIG. 37 is a schematic diagram for explaining the configuration of a projector system 910 A.
- the projector system 910 A includes plural projector main bodies 810 and plural connecting units 860 , 870 , 880 , and 890 .
- the projector main bodies 810 are hatched.
- three projector main bodies are connected horizontally and four projector main bodies are connected vertically via the connecting units 860 to 890 , i.e., twelve projector main bodies 810 are connected in total to form a lattice shape as a whole.
- the projector main bodies 810 are the same as that in the example E1. All the connecting units 860 , 870 , 880 , and 890 are connecting units for connecting the projector main bodies 810 , although shapes thereof are different. Like the connecting units 830 and 840 in the example E1, fitting sections (including projections) and through holes for fixing for connection with the projector main bodies 810 and other connecting units are provided at leading ends of the connecting units 860 , 870 , 880 , and 890 .
- a projector system including the plural projector main bodies 810 and assuming a lattice shape as a whole can be constructed by using the connecting units 860 to 890 having the different shapes.
- the projector main bodies 810 are connected via the connecting units 860 and the like. Therefore, for example, distances among the projector main bodies 810 can be changed by changing connecting units. For example, the distances among the projector main bodies 810 can be adjusted by using connecting units corresponding to the size of a display image and a projection distance. Therefore, a user can cope with various situations by preparing plural kinds of connecting units and changing the distances among the projector main bodies 810 without preparing projectors having different projection abilities according to setting places, purposes of use, and the like.
- the first connecting unit 830 and the second connecting unit 840 are detachably attachable to the projector main body 810 .
- the first connecting unit 830 and the second connecting unit 840 may be integrally formed with the projector main body 810 and configured unremovable.
- FIG. 38 is a schematic diagram of projectors in a modification.
- a projector 900 E in the modification includes a projector main body 810 E, a first connecting unit 830 E, and a second connecting unit 840 E.
- the second connecting unit 840 E includes a fitting section 850 E that fits in a first connecting unit 830 F of a projector 900 F and projections 852 E for maintaining a state of fitting with the first connecting unit 830 F.
- the projections 852 E are configured to recess when pressed and return to the original state (project) when pressing force stops being applied.
- the projector 900 F includes a projector main body 810 F, a first connecting unit 830 F, and a second connecting unit 840 F. Through holes for fixing 833 F that fit with the projections 852 E are provided in the first connecting unit 830 F of the projector 900 F.
- the projections 852 E fit in the through holes for fixing 833 F of the first connecting unit 830 F.
- the projector 900 E and the projector 900 F are connected and fixed.
- first connecting unit 830 E of the projector 900 E is inserted into the second connecting unit 840 F of the projector 900 F
- projections 837 E fit in through holes for fixing 843 F of the second connecting unit 840 F.
- the projector 900 E and the projector 900 F are connected and fixed. It is possible to easily connect plural projectors by connecting the projector 900 E and the projector 900 F each other in this way.
- Only one of the first connecting unit 830 and the second connecting unit 840 may be detachably attachable. Effects same as those in the example E1 explained above can be obtained even when only one of the connecting units is detachably attachable.
- the shape of the first connecting unit 830 and the second connecting unit 840 is not limited to that explained in the example E1.
- the connecting units 860 explained in the example E2 may be provided on both the sides of the projector main body 810 instead of the first connecting unit 830 and the second connecting unit 840 . This makes it possible to vertically arrange and connect the two projectors.
- the transfer method for image data is not limited to the example E1 explained above.
- one personal computer may be connected to each of the three projectors 900 and divided image data indicating divided images obtained by dividing a displayed image into three may be supplied from the personal computer to correspond to a display position of each of the projectors 900 . This also makes it possible to display a large-area image as in the example explained above.
- each of the projectors 900 displays the image obtained by dividing one horizontally-long image.
- images displayed by the plural projectors 900 are not limited to those explained in the example.
- FIGS. 39A to 39C are diagrams of modifications of an image displayed by the three projectors in the example E1.
- the projectors 900 may display the same image and, as a result, three same images may be displayed side by side on the screen SC ( FIG. 39A ).
- the projectors 900 may display different independent images ( FIG. 39B ).
- the first projector 900 A and the second projector 900 E may form one image and the third projector 900 C may display an image same as the image formed by the first projector 900 A and the second projector 900 E ( FIG. 39C ).
- the first connecting unit 830 in the projector 900 includes the sealing unit 835 and the exhaust port 834 .
- the projector 900 does not have to include the sealing unit 835 and the exhaust port 834 .
- the projector 900 inhales the air discharged from the adjacent projector 900 connected thereto. Therefore, the projector 900 may include a device that cools the discharged air, a device that cools the entire projector 900 , or the like.
- An air inlet e.g., a mesh port for cooling may be provided in the housing 822 included in the main body of the projector 900 .
- the wiring is applied to the first connecting unit 830 and the second connecting unit 840 .
- the two projectors 900 are connected to each other via the first connecting unit 830 and the second connecting unit 840 , the two projectors 900 can be electrically connected as well.
- the wiring does not have to be applied to the first connecting unit 830 and the second connecting unit 840 .
- FIG. 40A is a sectional view of a modification of the second connecting unit 840 A of the first projector 900 A.
- FIG. 40B is a sectional view of a modification of the first connecting unit 830 B of the second projector 900 B.
- a second connecting unit 840 H in a modification A includes a pawl section 841 .
- the pawl section 841 is urged to the inner side of the second connecting unit 840 H by a spring (an arrow C).
- a fitting section 836 H of a first connecting unit 830 H in the modification A has a pawl section 839 .
- the fitting section 836 H of the first connecting unit 830 H is inserted into the second connecting unit 840 H while the pawl section 841 of the second connecting unit 840 H is pressed (an arrow A).
- a fitting section 836 I of a first connecting unit 830 I and a second connecting unit 840 I in a modification B respectively include through holes 848 I and 849 I.
- the fitting section 836 I of the first connecting unit 830 I is inserted into the second connecting unit 840 I, positions of the through holes 848 I and 849 I are adjusted, and a connection pin P is pressed into the through holes 848 I and 849 I, whereby the first connecting unit 830 I and the second connecting unit 840 I are connected and do not come off. This also makes it possible to easily connect the first connecting unit 830 I and the second connecting unit 840 I.
- the projector 900 modulates light from the illumination optical unit 825 using the transmissive liquid crystal panel 826 .
- a light modulating device is not limited to the transmissive liquid crystal panel 826 .
- the projector 900 may modulate light from the illumination optical unit 825 using a digital micro-mirror device (DMD (registered trademark)), a reflective liquid crystal panel (liquid crystal on silicon (LCOS (registered trademark)), or the like.
- DMD digital micro-mirror device
- LCOS liquid crystal on silicon
Abstract
A projector that projects an image on a screen, includes: plural image generating units that generate an image lights representing the image; a main body housing that houses the plural image generating units; and plural projection optical units that are provided in the main body housing to respectively correspond to the plural image generating units and project the image lights generated by the image generating units on the screen.
Description
- 1. Technical Field
- The present invention relates to a projector (a projecting apparatus) that projects images on a screen.
- 2. Related Art
- In the past, various techniques concerning projectors are proposed.
- For example, JP-A-5-142655 and JP-A-2002-311501 disclose the technique for setting plural projectors and joining, on a screen, images respectively projected from the projectors to thereby project a relatively large image on the screen.
- JP-A-2004-198602 discloses the stationary screen and the movable stand-alone screen as screens used for projection of images.
- JP-A-9-162562, JP-A-2001-111917, and JP-A-2006-235156 disclose the stand having the structure in which plural wheels are provided on the bottom surface of a box, on which a projector is installed, in order to make it easy to set and carry the projector.
- However, the techniques in the past have various problems in setting projectors.
- For example, in the techniques in the past, since alignment work for images respectively projected from the plural projectors takes labor and time, it is difficult to carry a projection system set including the plural projectors and use the projection system in other places. Therefore, it is necessary to respectively set projection system sets in places where projection of images is required, leading to an increase in cost.
- When the stationary screen is used, places where images and images can be clearly projected by using the screen are limited. When the stand-alone screen is used, a user is forced to perform extremely troublesome work because the user has to carry and set the screen in addition to a projector and adjust a positional relation between the projector and the screen to a suitable state.
- With the stand in the past, the projector can be smoothly carried on a flat floor surface. However, because of the structure in which the plural wheels are provided on the bottom surface of the box, it is difficult to smoothly carry the projector on steps and stairs. Therefore, in places where projection of images is required, it is necessary to prepare and maintain a projector set including the stand in each of plural sections divided by steps and stairs (e.g., in each of floors of buildings), leading to an increase in cost.
- An advantage of some aspects of the invention is to provide a technique for making it possible to easily set a projector.
- The invention can be realized as forms or application examples explained below.
- A projector according to Application Example A1 is a projector that projects an image on a screen, including: plural imaging optical units that generate projection lights representing the image; a main body housing that houses the plural imaging optical units; and plural projecting units that are provided in the main body housing to respectively correspond to the plural imaging optical units and project the projection lights generated by the imaging optical units on the screen. With the projector according to Application Example A1, since the plural imaging optical units and the plural projecting units are positioned in the main body housing, it is possible to reduce a load for aligning plural images respectively projected from the plural projecting units.
- It is preferable that, in the projector according to Application Example A1, each of the plural imaging optical units generates projection light representing a partial image corresponding to a part of a display area in an image projected on the screen, and each of the plural projecting units projects the projection light generated by the imaging optical unit on the display area corresponding to the partial image on the screen. With the projector according to Application Example A2, it is possible to realize an increase in the size of an image projected on the screen while reducing a load for aligning plural images respectively projected from the plural projecting units.
- It is preferable that, in the projector according to Application Example A1 or A2, the main body housing has plural planes that form an outer surface, and the plural projecting units are provided on the same plane in the main body housing. With the projector according to Application Example A3, it is possible to reduce a load for aligning plural images respectively projected from the plural projecting units compared with a load applied when the plural projecting units are provided over the plural planes.
- It is preferable that, in the projector according to any one of Application Examples A1 to A3, the plural imaging optical units and the plural projecting units line up substantially in a straight line. With the projector according to Application Example A4, it is possible to efficiently house the plural imaging optical units and the plural projecting units in the inside of the main body housing.
- It is preferable that, in the projector according to any one of Application Examples A1 to A4, an optical axis of projection light projected from the projecting unit located at an end of the line of the plural projecting units inclines in a direction opposite to a direction in which the other projecting units adjacent to the projecting unit are located. With the projector according to Application Example A5, it is possible to project projection light in a wider range and realize an increase in the size of an image projected on the screen.
- It is preferable that the projector according to any one of Application Examples A1 to A5 further includes: a light source that radiates light; and a light distributing unit that distributes the light radiated from the light source to the respective plural imaging optical units. With the projector according to Application Example A6, it is possible to prevent lights supplied to the respective plural imaging optical units from becoming non-uniform because of an individual difference of the light source. This makes it possible to suppress color unevenness and luminance unevenness among plural images projected from the respective plural projecting units.
- Concerning Application Examples A1 to A6, a form of the invention is not limited to the projector. The invention can also be applied to other forms such as a system including the projector and a projection method for projecting an image on the screen. The invention is not limited to the forms explained above. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- A projector according to Application Example B1 is a projector that projects an image on a screen, including: plural imaging optical units that generate projection lights representing the image; a main body housing that houses the plural imaging optical units; plural projecting units that are provided in the main body housing to respectively correspond to the plural imaging optical units and project the projection lights generated by the imaging optical units on the screen; and an extending and retracting unit that extends and retracts the main body housing in a direction in which the plural projecting units are connected. With the projector according to Application Example B1, it is possible to increase and decrease spaces among the plural projecting units with the extending and retracting unit of the main body housing after aligning the plural projecting units in the main body housing. As a result, it is possible to realize an increase in the size of an image projected on the screen while reducing a load for aligning plural images respectively projected from the plural projecting units.
- It is preferable that, in the projector according to Application Example E1, the extending and retracting unit includes a holding unit that holds a state in which the main body housing is extended or retracted. With the projector according to Application Example B2, since the plural projecting units are held in a state in which spaces among the plural projecting units are increased or decreased, it is possible to further reduce a load for aligning plural images respectively projected from the plural projecting units.
- It is preferable that the projector according to Application Example B1 or B2 further includes: an extension and retraction detecting unit that detects an extension/retraction distance of the extended or retracted main body housing; and an image adjusting unit that adjusts, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen. With the projector according to Application Example B3, since an image projected on the screen is adjusted according to spaces among the plural projecting units, it is possible to further reduce a load for aligning plural images respectively projected from the plural projecting units.
- It is preferable that, in the projector according to Application Example B3, the image adjusting unit includes an expansion and reduction adjusting unit that expands and reduces, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen. With the projector according to Application Example B4, it is possible to expand and reduce, according to spaces among the plural projecting units, an image projected on the screen.
- It is preferable that, in the projector according to Application Example B3 or B4, the image adjusting unit includes an optical-axis adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, optical axes of projection lights projected from the plural projecting units. With the projector according to Application Example B5, it is possible to move, according to spaces among the plural projecting units, optical axes of projection lights projected from the plural projecting units.
- It is preferable that, in the projector according to any one of Application Examples B3 to B5, the image adjusting unit includes a focus adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, focuses of projection lights projected from the plural projecting units. With the projector according to Application Example B6, it is possible to move, according to spaces among the plural projecting units, focuses of projection lights projected from the plural projecting units.
- It is preferable that, in the projector according to any one of Application Examples B3 to B6, the image adjusting unit includes a keystone-distortion adjusting unit that corrects, according to the extension/retraction distance detected by the extension and retraction detecting unit, a keystone distortion of an image projected on the screen. With the projector according to Application Example B7, it is possible to correct, according to spaces among the plural projecting units, a keystone distortion of an image projected on the screen.
- It is preferable that, in the projector according to any one of Application Examples B1 to B7, each of the plural imaging optical units generates projection light representing a partial image corresponding to a part of a display area in an image projected on the screen, and each of the plural projecting units projects the projection light generated by the imaging optical unit on the display area corresponding to the partial image on the screen. With the projector according to Application Example B8, it is possible to realize an increase in the size of an image projected on the screen while reducing a load for aligning plural images respectively projected from the plural projecting units.
- Concerning Application Examples B1 to B8, a form of the invention is not limited to the projector. The invention can also be applied to other forms such as a system including the projector and a projection method for projecting an image on the screen. The invention is not limited to the forms explained above. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- An image projection system according to Application Example C1 includes: a sheet-like screen that can be wound and unwound; a screen winding unit that performs winding and unwinding of the sheet-like screen; a main body housing that can house the wound sheet-like screen; and a projector that projects an image on the unwound sheet-like screen housed in the main body housing.
- With the image projection system according to Application Example C1, since the projector can be housed in the main body housing and the sheet-like screen is wound and housed in the inside of the main body housing, a user can easily carry the projector and the screen. Since a positional relation between the screen and the projector does is not substantially different depending on a setting place, the user can easily perform adjustment for projection.
- It is preferable that the image projection system according to Application Example C1 includes a plurality of the projectors, the sheet-like screen is unwound to thereby form a projection area on which the image is projected, the projection area has opposed two sides, length of which is not changed by winding and unwinding of the sheet-like screen, and the plural projectors are arranged on the two sides.
- This makes it possible to dividedly project an image with the plural projectors and simultaneously project different images.
- It is preferable that the image projection system according to Application Example C1 or C2 further includes an oscillating element for sound output, and the sheet-like screen functions as a speaker employing the oscillating element.
- Consequently, since the sheet-like screen functions as the speaker, it is possible to easily construct an environment for sound reproduction compared with a configuration in which a speaker device is prepared separately from the projector and the sheet-like screen. Since the sheet-like screen is caused to function as the speaker, it is possible to secure a large acoustic area and perform large-volume sound output.
- It is preferable that, in the image projection system according to Application Example C3, the oscillating element is arranged in the inside of the sheet-like screen.
- This makes it possible to easily wind the sheet-like screen compared with a configuration in which the oscillating element is arranged on a front surface or a rear surface of the sheet-like screen.
- It is preferable that, in the image projection system according to any one of Application Examples C1 to C4, the projector includes plural projection mechanisms that emit image lights representing an image, and each of the projection mechanisms emits image light of a partial image corresponding to a part of an image projected on the screen.
- Consequently, even when a projection distance (an optical distance) between the sheet-like screen and each of the projection mechanisms is small, it is possible to show an image in a large size by combining partial images.
- It is preferable that, in the image projection system according to Application Example C5, the main body housing has plural planes forming an outer surface, and each of the projection mechanisms emits the image light of the partial image from the same plane in the main body housing.
- This makes it possible to reduce a load for aligning plural images projected by the projection mechanisms compared with a configuration in which image lights are emitted from the plural planes.
- It is preferable that, in the image projection system according to Application Example C5 or C6, the plural projection mechanisms are arranged to line up in a straight line in the main body housing.
- This makes it possible to efficiently house the projection mechanisms in the inside of the main body housing. Since large spaces can be secured among image lights emitted from the projection mechanisms, it is possible to project an image in a large size even if a projection distance (an optical distance) between the main body housing and the sheet-like screen is small.
- A stand according to Application Example D1 is a stand on which a projector is set, including: a pedestal on which the projector is installed; first and second support legs that are foldably connected to the pedestal and rise from a floor surface to support the pedestal in cooperation with each other; a handle that is provided in the first support leg, comes into contact with the floor surface in a state in which the first support leg supports the pedestal, and projects from the pedestal in a state in which the first support leg is folded to the pedestal; and a wheel that is provided in the second support leg, comes into contact with the floor surface in a state in which the second support leg supports the pedestal, and projects from the pedestal in a state in which the second support leg is folded to the pedestal. With the stand according to Application Example D1, it is possible to easily carry a projector set including the stand by folding the first and second support legs to the pedestal, bringing the wheel provided in the second support leg into contact with the ground, and gripping the handle provided in the first support leg to tug the projector set.
- It is preferable that, in the stand according to Application Example D1, the first and second support legs are foldable generally along a longitudinal direction of the pedestal, the handle projects from one end in the longitudinal direction of the pedestal, and the wheel projects from an end on the opposite side of the one end in the longitudinal direction of the pedestal. With the stand according to Application Example D2, when first and second support legs are drawn out from the pedestal to set the projector, it is possible to secure sufficient height from the floor surface to the projector. When the first and second support legs are folded to the pedestal to carry the projector, it is possible to secure sufficient length from the wheel to the handle.
- It is preferable that the stand according to Application Example D1 or D2 further includes: a first connecting unit that connects the pedestal and the first support leg; and a second connecting unit that connects the pedestal and the second support leg, and the first support leg is foldable toward the second connecting unit, and the second support leg is foldable toward the first connecting unit. With the stand according to Application Example D3, when the first and second connecting units are folded to the pedestal to carry the projector, it is possible to reduce a load applied to the first and second connecting units.
- It is preferable that, in the stand according to any one of Application Examples D1 to D3, the handle has a bar-like section connected to the wheel and substantially parallel to the wheel. With the stand according to Application Example D4, when the first and second connecting units are drawn out from the pedestal to carry the projector, it is possible to bring the bar-like section into contact with the floor surface to halt the rotation of the wheel. When the first and second connecting units are folded to the pedestal to carry the projector, it is possible to grip the bar-like section to easily tug the projector.
- It is preferable that the stand according to any one of Application Examples D1 to D4 further includes a position fixing unit that fixes, in multiple stages, positions where the handle and the wheel are set farther away from the pedestal stepwise. With the stand according to Application Example D5, it is possible to adjust, in multiple stages, height at which the projector is set.
- It is preferable that the stand according to any one of Application Examples D1 to D5 further includes a height adjusting unit that adjusts height at which the projector is installed on the pedestal. With the stand according to Application Example D6, it is possible to adjust height at which the projector is set while keeping the first and second support legs fixed.
- It is preferable that, in the stand according to any one of Application Examples D1 to D6, the handle comes into contact with the floor surface via a non-slip member having a coefficient of friction higher than that of the first support leg. With the stand according to Application Example D7, it is possible to prevent the stand from shifting from the floor surface.
- A projector system according to Application Example D8 includes a projector attached to the stand according to any one of Application Examples D1 to D7. With the projector system according to Application Example D8, it is possible to easily carry a projector set including the stand by folding the first and second support legs to the pedestal, bringing the wheel provided in the second support leg into contact with the ground, and gripping the handle provided in the first support leg to tug the projector set.
- Concerning Application Examples D1 to D8, the form of the invention is not limited to the stand and the projector system. For example, the invention can also be applied to a projection method for projecting an image on the screen, a setting method for setting the projector, and a carrying method for carrying the projector. The invention is not limited to the forms explained above. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- A projector according to Application Example E1 includes: a projector main body that projects image light representing an image on a projection surface; and a connecting unit for connecting the projector to another projector with a positional relation thereof fixed.
- The projector itself includes the connecting unit. Therefore, if a plurality of the projectors are prepared and connected via connecting units, it is possible to easily connect the plural projectors without using special devices, instruments, and the like other than the projectors to be connected. The connecting unit of the projector fixes a positional relation with another projector connected thereto. Therefore, if a plurality of the projectors are connected, it is possible to accurately arrange the plural projectors. As a result, it is possible to obtain a highly accurate image.
- It is preferable that, in the projector according to Application Example E1, the connecting unit is detachably attachable.
- With the projector, since the connecting unit is detachably attachable, it is possible to easily connect projectors in a positional relation corresponding to a setting state by changing the length and the shape of the connecting unit.
- It is preferable that, in the projector according to Application Example E1 or E2, the connecting unit includes a signal line for transmitting and receiving an electric signal and electrically connects the projector to the other projector.
- The projector is electrically connected to the other projector by the connecting unit. Therefore, for example, it is possible to perform communication among the connected projectors. As a result, the trouble of connecting plural projectors using wires separate from the projectors is reduced. Since the wires separate from the projectors for connecting the plural projectors are reduced, the projectors are connectedly neatly in appearance.
- It is preferable that the projector according to any one of Application Examples E1 to E3 further includes an exhaust port for discharging the air in the inside of a main body of the projector to the outside of the projector, and the exhaust port is arranged in a position where, when the projector is connected to another projector via the connecting unit, exhaust from the projector does not blow on the other projector.
- With the projector, when plural projectors are connected, exhaust does not blow on projectors adjacent to the projector. Therefore, it is possible to reduce the likelihood of failure of the projector due to heated exhaust.
- Concerning Application Examples E1 to E4, the invention can be realized in various forms. For example, the invention can be realized in a form of a projector system or the like in which plural same projector main bodies are connected via connecting units.
- The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.
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FIG. 1 is a diagram for mainly explaining the external configuration of a projector according to a first embodiment of the invention. -
FIG. 2 is a diagram for mainly explaining the configuration of the projector viewed from a top surface of a main body housing. -
FIG. 3 is a diagram for mainly explaining the detailed configuration of the projector. -
FIG. 4 is a diagram for mainly explaining the detailed configuration of a projector in a first modification. -
FIG. 5 is a diagram for mainly explaining the external configuration of a projector in a second modification. -
FIG. 6 is diagram for mainly explaining the external configuration of a projector according to a second embodiment of the invention. -
FIG. 7 is a diagram for mainly explaining the external configuration of the projector in which a main body housing is extended. -
FIG. 8 is a diagram for explaining details of an extending and retracting unit in the main body housing. -
FIG. 9 is a diagram for mainly explaining the detailed configuration of the projector. -
FIG. 10 is a diagram for explaining the detailed configuration of a main control unit. -
FIG. 11 is a diagram for mainly explaining the configuration of the projector viewed from a top surface of the main body housing. -
FIG. 12 is a diagram for explaining the schematic configuration of an image projection system according to a third embodiment of the invention. -
FIG. 13 is a diagram for explaining the image projection system taken along A-A section inFIG. 12 . -
FIG. 14 is a diagram for explaining the detailed configuration of the image projection system. -
FIG. 15A is a diagram for explaining an arrangement example of the image projection system. -
FIG. 15B is a diagram for explaining an arrangement example of the image projection system. -
FIG. 15C is a diagram for explaining an arrangement example of the image projection system. -
FIG. 15D is a diagram for explaining an arrangement example of the image projection system. -
FIG. 16 is a diagram for explaining the schematic configuration of an image projection system in an example C2. -
FIG. 17 is a diagram for explaining the detailed configuration of a first projection unit shown inFIG. 16 . -
FIG. 18 is a diagram for explaining the detailed configuration of a second projection unit shown inFIG. 16 . -
FIG. 19 is a diagram for explaining the schematic configuration of an image projection system in an example C3. -
FIG. 20 is a diagram for explaining the image projection system taken along B-B section inFIG. 19 . -
FIG. 21 is a diagram for explaining the schematic configuration of an image projection system in an example C4. -
FIG. 22 is a diagram for explaining a state in which a projector according to a fourth embodiment of the invention is attached to a stand. -
FIG. 23 is a diagram for explaining a state in which the projector attached to the stand is carried. -
FIG. 24 is a diagram for mainly explaining the detailed configuration of the stand in a setting form viewed from a direction opposed to a screen. -
FIG. 25 is a diagram for mainly explaining the detailed configuration of the stand transformed into a carrying form from the state shown inFIG. 24 . -
FIG. 26 is a diagram for explaining the detailed configuration of the stand in the carrying form shown inFIG. 25 viewed from a floor surface. -
FIG. 27 is a diagram for mainly explaining the external configuration of the projector. -
FIG. 28 is a diagram for mainly explaining the detailed configuration of a stand in the setting form in a first modification viewed from the direction opposed to the screen. -
FIG. 29 is a diagram for mainly explaining the detailed configuration of a stand in the setting form in a second modification viewed from the direction opposed to the screen. -
FIG. 30 is a diagram for explaining a handle in another embodiment. -
FIG. 31 is a schematic diagram for explaining the configuration of a projector in an example E1 of a fifth embodiment. -
FIG. 32 is a schematic diagram of a state in which first and second connecting units are removed from a projector main body. -
FIG. 33 is a diagram for explaining a connection process for three projectors. -
FIG. 34 is an enlarged diagram of an X section inFIG. 33 . -
FIG. 35 is a diagram for explaining a flow of the air flowing through the three projectors when the projectors are connected and used. -
FIG. 36 is a diagram of an example in which the three first projectors are connected and used. -
FIG. 37 is a schematic diagram for explaining the configuration of a projector system in an example E2. -
FIG. 38 is a schematic diagram of projectors in a modification. -
FIG. 39A is a diagram of a modification of an image displayed by the three projectors. -
FIG. 39B is a diagram of a modification of the image displayed by the three projectors. -
FIG. 39C is a diagram of a modification of the image displayed by the three projectors. -
FIG. 40A is a sectional view of a modification of a second connecting unit of a first projector. -
FIG. 40B is a sectional view of a modification of a first connecting unit of a second projector. - Projectors as projecting apparatuses to which the invention is applied are explained below in order to further clarify the configurations and actions of the invention explained above.
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FIG. 1 is a diagram for mainly explaining the external configuration of aprojector 10. Theprojector 10 projects an image RP on ascreen 80. Thescreen 80 is a plane on which the image RP is displayed. Thescreen 80 may be a movie screen or may be a wall surface. In this example, the image RP projected by theprojector 10 is an image formed by joining two partial images RPa and RPb. In this example, an overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in a seam of the partial image RPa and the partial image RPb. - The
projector 10 includeslight source units image generating units optical units screen 80. The partial image RPa in the image RP is projected by using thelight source unit 20 a, theimage generating unit 30 a, and the projectionoptical unit 40 a. Specifically, the light radiated from thelight source unit 20 a is projected on thescreen 80 from the projectionoptical unit 40 a after being modulated into projection light representing the partial image RPa by theimage generating unit 30 a. The partial image RPb in the image RP is projected by using thelight source unit 20 b, the imagingoptical unit 30 b, and the projectionoptical unit 40 b. Specifically, the light radiated from thelight source unit 20 b is projected on thescreen 80 from the projectionoptical unit 40 b after being modulated into projection light representing the partial image RPb by theimage generating unit 30 b. Details of thelight source units image generating units optical units - The
projector 10 includes amain body housing 50 that houses thelight source units image generating units optical units main body housing 50 is a hexahedron. Outer surfaces forming the hexahedron include atop surface 51, abottom surface 52, afront surface 53, aback surface 54, aleft side 55, and aright side 56. Thetop surface 51 of themain body housing 50 is an upper end located in an upper part in themain body housing 50. Thebottom surface 52 of themain body housing 50 is a bottom end as a surface opposed to thetop surface 51. Thefront surface 53 of themain body housing 50 is a front end facing thescreen 80 in themain body housing 50. Theback surface 54 of themain body housing 50 is a surface opposed to thefront surface 53 and is a rear end with the back thereof facing thescreen 80 in themain body housing 50. Theleft side 55 of themain body housing 50 is a side end located on the left side in front of thescreen 80. Theright side 56 of themain body housing 50 is a side end located on the right side in front of thescreen 80. - In this example, the
top surface 51, thebottom surface 52, thefront surface 53, and theback surface 54 of themain body housing 50 are rectangles having long sides extending from theleft side 55 to theright side 56. In this example, the projectionoptical unit 40 b, theimage generating unit 30 b, thelight source unit 20 b, thelight source unit 20 a, theimage generating unit 30 a, and the projectionoptical unit 40 a line up substantially in a straight line in this order from theleft side 55 to theright side 56 of themain body housing 50. - In the
main body housing 50,openings optical units main body housing 50 are provided such that projection lights from the projectionoptical units screen 80. In this example, themain body housing 50 houses the entire projectionoptical units main body housing 50 may house the projectionoptical units openings openings top surface 51 of themain body housing 50. The projectionoptical units top surface 51 as the same plane in themain body housing 50. -
FIG. 2 is a diagram for mainly explaining the configuration of themain body housing 50 of theprojector 10 viewed from thetop surface 51. When viewed from thetop surface 51 of themain body housing 50, an optical axis APa of projection light projected from the projectionoptical unit 40 a inclines at an angle θa in a direction opposite to a direction in which the projectionoptical unit 40 b adjacent to the projectionoptical unit 40 a is located. When viewed from thetop surface 51 of themain body housing 50, an optical axis APb of projection light projected from the projectionoptical unit 40 b inclines at an angle θb in a direction opposite to a direction in which the projectionoptical unit 40 a adjacent to the projectionoptical unit 40 b is located. Therefore, in this example, the optical axes APa and APb incline in the directions opposed to each other. -
FIG. 3 is a diagram for mainly explaining the detailed configuration of theprojector 10. Thelight source unit 20 a of theprojector 10 includes alight source 21 that radiates light. In this example, thelight source 21 is an ultra-high pressure mercury lamp (UHE lamp). However, in other embodiments, thelight source 21 may be a light emitting diode (LED). In this example, the configuration of thelight source unit 20 b is the same as that of thelight source unit 20 a. - In this example, the
image generating unit 30 a of theprojector 10 is a color separating and combining optical unit. Theimage generating unit 30 a separates light radiated by thelight source 21 into red light, green light, and blue light, modulates the respective lights, and then combines these lights as one light again to thereby generate projection light. Theimage generating unit 30 a includesintegrator lenses polarization converting element 33,dichroic mirrors light modulators dichroic prism 39. In this example, the number of spatial light modulators is three. However, in other embodiments, the number of spatial light modulators may be equal to or smaller than three or may be equal to or larger than three. In this example, the spatial light modulators are transmissive liquid crystal panels that modulate transmitted light. However, in other embodiments, a reflective liquid crystal panel that modulates reflected light may be used or a micro-mirror type light modulating device such as a digital micro-mirror device (DMD (registered trademark)) may be used. In this example, the configuration of theimage generating unit 30 b is the same as that of theimage generating unit 30 a. - The projection
optical unit 40 a of the projector includes afront lens 41, azoom lens 42, amaster lens 43, afocus lens 44, and aparallel glass 45. These lenses are arrayed in this order to configure a projection lens unit. In this example, thezoom lens 42 and thefocus lens 44 move back and forth along an optical axis of the projectionoptical unit 40 a. In this example, the projectionoptical unit 40 a further includes areflection mirror 48 that makes projection light from theimage generating unit 30 a incident on theparallel glass 45. - The
projector 10 further includes amain control unit 100, auser interface 130, animage input unit 140, spatial-light-modulation control units lens driving units imaging sensor 182. - The
user interface 130 of theprojector 10 receives instruction input from a user of theprojector 10. In this example, theuser interface 130 includes, in addition to plural buttons for receiving pressing input from the user, an infrared interface that receives infrared input from a remote controller. - The
image input unit 140 of theprojector 10 is connected to an external apparatus such as a personal computer or a digital image camera and receives the input of image data representing the image RP projected on thescreen 80. - The spatial-light-
modulation control units projector 10 control the spatiallight modulators image generating units image input unit 140. In this example, the spatiallight modulators modulation control units - The
lens driving units projector 10 drive thezoom lenses 42 and thefocus lenses 44 of the projectionoptical units - The
imaging sensor 182 of theprojector 10 is an image sensor that captures an image on thescreen 80. In this example, theimaging sensor 182 is a CCD image sensor (Charge Coupled Device Image Sensor) as one of solid-state imaging devices. However, theimaging sensor 182 may be a CMOS image sensor (Complementary Metal Oxide Semiconductor image sensor). - The
main control unit 100 of theprojector 10 controls the units of theprojector 10. In this example, themain control unit 100 is a computer including a central processing unit (hereinafter referred to as CPU) and a memory. Various functions executed by themain control unit 100 are realized by the CPU operating on the basis of software. However, in other embodiments, the functions may be realized by an electronic circuit operating on the basis of a physical circuit configuration thereof. - The
main control unit 100 executes image projection processing for projecting the image RP based on image data input from theimage input unit 140 on thescreen 80. The image projection processing is processing for generating two image data representing the partial images RPa and RPb on the basis of the image data input from theimage input unit 140. The image data representing the partial image RPa is output from themain control unit 100 to the spatial-light-modulation control unit 150 a. The image data representing the partial image RPb is output from themain control unit 100 to the spatial-light-modulation control unit 150 b. Consequently, projection light representing the partial image RPa is generated by theimage generating unit 30 a and projected on thescreen 80 from the projectionoptical unit 40 a. Projection light representing the partial image RPb is generated by theimage generating unit 30 b and projected on thescreen 80 from the projectionoptical unit 40 b. Portions corresponding to the overlapping area RPw in the partial images RPa and RPb are formed in a comb tooth shape or a mosaic shape to thereby complement each other to form one image such that the seam of the partial image RPa and the partial image RPb is not conspicuous. - The
main control unit 100 executes, on the basis of an image captured by theimaging sensor 182, image adjustment processing for adjusting the image RP projected on thescreen 80. In the image adjustment processing, keystone correction processing, focus adjustment processing, expansion and reduction adjustment processing, unevenness adjustment processing, and the like are applied to each of the partial images RPa and RPb. The keystone correction processing is processing for correcting, according to the shape of an image projected on thescreen 80 and a distance from theprojector 10 to thescreen 80, image data output from themain control unit 100 to the spatial-light-modulation control units screen 80 with respect to theprojector 10 is reduced. The focus adjustment processing is processing for adjusting a focus of projection light according to the distance from theprojector 10 to thescreen 80. The expansion and reduction adjustment processing is processing for adjusting, according to the size of thescreen 80, the size of the partial images RPa and RPb projected on thescreen 80. The unevenness adjustment processing is processing for suppressing color unevenness and luminance unevenness between the partial image RPa and the partial image RPb to thereby obtain uniform color reproducibility over the entire display area of the image RP. - With the
projector 10 explained above, since the pluralimage generating units optical units main body housing 50, it is possible to reduce a load for aligning the plural partial images RPa and RPb respectively projected from the plural projectionoptical units - The plural partial images RPa and RPb are combined to project one image RP on the
screen 80. This makes it possible to realize an increase in the size of the image RP projected on thescreen 80 while reducing a load for aligning the plural partial images RPa and RPb respectively projected from the plural projectionoptical units - The plural projection
optical units top surface 51 as the same plane in themain body housing 50. This makes it possible to reduce a load for aligning the plural partial images RPa and RPb compared with a load applied when the plural projectionoptical units - The plural
image generating units optical units image generating units optical units main body housing 50. - The optical axis APa of the projection
optical unit 40 a inclines at the angle θa to the opposite side of the direction in which the projectionoptical unit 40 b is located. The optical axis APb of the projectionoptical unit 40 b inclines at the angle θb to the opposite side of the direction in which the projectionoptical unit 40 a is located. This makes it possible to project projection light in a wider range and realize an increase in the size of the image RP projected on thescreen 80. -
FIG. 4 is a diagram for mainly explaining the detailed configuration of theprojector 12 in a first modification. Aprojector 12 in the first modification is the same as theprojector 10 explained above except that theprojector 12 includes, instead of thelight source units projector 10, alight source unit 20 that supplies light to both theimage generating unit 30 a and theimage generating unit 30 b in common. - The
light source unit 20 of theprojector 12 includes alight source 21 and alight distributing unit 24. In the first modification, thelight source 21 of thelight source unit 20 is an ultra-high pressure mercury lamp (UHE lamp). However, in other embodiments, thelight source 21 may be a light emitting diode (LED). Thelight distributing unit 24 of thelight source unit 20 distributes light radiated from thelight source 21 to each of theimage generating units light distributing unit 24 distributes the light using a prism. However, in other embodiments, thelight distributing unit 24 may distribute the light using an optical fiber. - With the
projector 12 in the first modification explained above, it is possible to prevent lights supplied to the pluralimage generating units optical units -
FIG. 5 is a diagram for mainly explaining the external configuration of aprojector 13 in a second modification. Theprojector 10 explained above includes the twolight source units image generating units optical units projector 13 in the second modification includes threelight source units image generating units optical units projector 13 is an image obtained by joining three partial images RPa, RPb, and RPc. In this example, the overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in a seam of the partial image RPa and the partial image RPb. The overlapping area RPw where the two partial images RPb and RPc overlap each other is formed in a seam of the partial image RPb and the partial image RPc. - In this example, the
light source unit 20 c, the imagingoptical unit 30 c, and the projection optical unit 40 c in theprojector 13 in the second modification are the same as thelight source unit 20 b, theimage generating unit 30 b, and the projectionoptical unit 40 b in theprojector 10 explained above. The partial image RPc in the image RP is projected by using thelight source unit 20 c, the imagingoptical unit 30 c, and the projection optical unit 40 c. Specifically, light radiated from thelight source unit 20 c is projected on thescreen 80 from the projection optical unit 40 c after being modulated into projection light representing the partial image RPc by the imagingoptical unit 30 c. - The
main body housing 50 of theprojector 13 in the second modification houses thelight source units image generating units optical units optical unit 30 c, thelight source unit 20 c, the projectionoptical unit 40 b, theimage generating unit 30 b, thelight source unit 20 b, thelight source unit 20 a, theimage generating unit 30 a, and the projectionoptical unit 40 a line up substantially in a straight line in this order from theleft side 55 to theright side 56 of themain body housing 50. - In the
main body housing 50 in the second modification,openings optical units main body housing 50 are provided such that projection lights from the projectionoptical units screen 80. In the second modification, theopenings top surface 51 of themain body housing 50. The projectionoptical units top surface 51 as the same plane in themain body housing 50. - In the second modification, when viewed from the
top surface 51 of themain body housing 50, an optical axis of the projectionoptical unit 40 b located in the center among the projectionoptical units optical units 40 a and 40 c at a substantial right angle. In the second modification, when viewed from thetop surface 51 of themain body housing 50, an optical axis of the projectionoptical unit 40 a located on the outer side at an end of the line of the projectionoptical units optical units 40 b and 40 c. An optical axis of the projection optical unit 40 c located on the outer side at an end of the line of the projectionoptical units optical units - With the
projector 13 in the third modification explained above, since the threeimage generation units optical units main body housing 50, it is possible to reduce a load for aligning the plural partial images RPa, RPb, and RPc respectively projected from the plural projectionoptical units - The three partial images RPa, RPb, and RPc are combined to project one image RP on the
screen 80. This makes it possible to realize a further increase in the size of the image RP projected on thescreen 80 while reducing a load for aligning the plural partial images RPa, RPb, and RPc respectively projected from the plural projectionoptical units - The embodiment of the invention is explained above. However, the invention is not limited by the embodiment. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention. For example, the number of projecting units and imaging optical units is not limited to two or three and may be equal to or lager than four. A light source unit in a projector including three or more imaging optical units may be plural light source units respectively corresponding to the three or more imaging optical units or may be a light source unit that supplies light to each of the three or more imaging optical units in a distributed manner.
- A plane for arranging the projecting units in the
main body housing 50 is not limited to thetop surface 51. The projecting units may be arranged on any one of thebottom surface 52, thefront surface 53, theback surface 54, theleft side 55, and theright side 56 according to a setting form of the projector, an external shape of the projector, relative positions of the projector and the screen, and the like or may be arranged over two or more planes. In this example, the projecting units and the imaging optical units are arranged substantially in a straight line. However, in other embodiments, the projecting units and the imaging optical units may be arranged in a lattice shape in which vertical columns and horizontal columns cross each other. - The projecting units are not limited to projection lens units in which plural lenses are arrayed. The projecting units may be optical units that reflect projection lights generated by the imaging optical units to the
screen 80 using at least one of an aspherical lens, a magnifying lens, a diffusion glass, an aspherical mirror, and a reflection mirror. - In
FIGS. 1 and 5 , the image RP is projected in the state in which theprojectors projectors projectors -
FIG. 6 is a diagram for mainly explaining the external configuration of aprojector 210. Theprojector 210 projects the image RP on ascreen 280. Thescreen 280 is a plane on which the image RP is displayed. Thescreen 280 may be a movie screen or may be a wall surface. In this example, the image RP projected by theprojector 210 is an image formed by joining the two partial images RPa and RPb. In this example, the overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in the seam of the partial image RPa and the partial image RPb. - The
projector 210 includeslight source units image generating units optical units screen 280. The partial image RPa in the image RP is projected by using thelight source unit 220 a, theimage generating unit 230 a, and the projectionoptical unit 240 a. Specifically, the light radiated from thelight source unit 220 a is projected on thescreen 280 from the projectionoptical unit 240 a after being modulated into projection light representing the partial image RPa by theimage generating unit 230 a. The partial image RPb in the image RP is projected by using thelight source unit 220 b, theimage generating unit 230 b, and the projectionoptical unit 240 b. Specifically, the light radiated from thelight source unit 220 b is projected on thescreen 280 from the projectionoptical unit 240 b after being modulated into projection light representing the partial image RPb by theimage generating unit 230 b. Details of thelight source units image generating units optical units - The
projector 210 includes amain body housing 250 that houses thelight source units image generating units optical units main body housing 250 is a hexahedron. Outer surfaces forming the hexahedron include atop surface 251, abottom surface 252, afront surface 253, aback surface 254, aleft side 255, and aright side 256. Thetop surface 251 of themain body housing 250 is an upper end located in an upper part in themain body housing 250. Thebottom surface 252 of themain body housing 250 is a bottom end as a surface opposed to thetop surface 251. Thefront surface 253 of themain body housing 250 is a front end facing thescreen 280 in themain body housing 250. Theback surface 254 of themain body housing 250 is a surface opposed to thefront surface 253 and is a rear end with the back thereof facing thescreen 280 in themain body housing 250. Theleft side 255 of themain body housing 250 is a side end located on the left side in front of thescreen 280. Theright side 256 of themain body housing 250 is a side end located on the right side in front of thescreen 280. - In this example, the
top surface 251, thebottom surface 252, thefront surface 253, and theback surface 254 of themain body housing 250 are rectangles having long sides extending from theleft side 255 to theright side 256. In this example, the projectionoptical unit 240 b, theimage generating unit 230 b, thelight source unit 220 b, thelight source unit 220 a, theimage generating unit 230 a, and the projectionoptical unit 240 a line up substantially in a straight line in this order from theleft side 255 to theright side 256 of themain body housing 250. - In the
main body housing 250,openings optical units main body housing 250 are provided such that projection lights from the projectionoptical units screen 280. In this example, themain body housing 250 houses the entire projectionoptical units main body housing 250 may house the projectionoptical units openings openings top surface 251 of themain body housing 250. The projectionoptical units top surface 251 as the same plane in themain body housing 250. -
FIG. 7 is a diagram for mainly explaining the external configuration of theprojector 210 in which themain body housing 250 is extended. Themain body housing 250 includes afirst housing 250 a, asecond housing 250 b, and athird housing 250 c. Thefirst housing 250 a forms a section that houses the projectionoptical unit 240 a. Thesecond housing 250 b forms a section that houses the projectionoptical unit 240 b. Thethird housing 250 c is located between thefirst housing 250 a and thesecond housing 250 b and slidably connected to each of thefirst housing 250 a and thesecond housing 250 b in directions for connecting thefirst housing 250 a and thesecond housing 250 b. In other words, a connection structure for the first andsecond housings third housing 250 c configure an extending and retracting unit that extends and retracts themain body housing 250 in the directions for connecting the projectionoptical unit 240 a and the projectingunit 240 b. - In this example, the projection
optical unit 240 a is fixed to thefirst housing 250 a, the projectionoptical unit 240 b is fixed to thesecond housing 250 b, and thelight source units image generating units third housing 250 c. According to the slide movement of thefirst housing 250 a and thesecond housing 250 b, a space between the projectionoptical unit 240 a and theimage generating unit 230 a and a space between the projectingunit 240 b and theimage generating unit 230 b increases and decreases. In other embodiments, thelight source unit 220 a, theimage generating unit 230 a, and the projectionoptical unit 240 a may be fixed to thefirst housing 250 a, thelight source unit 220 b, theimage generating unit 230 b, and the projectionoptical unit 240 b may be fixed to thesecond housing 250 b, and, according to the slide movement of thefirst housing 250 a and thesecond housing 250 b, the sections respectively fixed to thefirst housing 250 a and thesecond housing 250 b may move. - In this example, the
first housing 250 a and thesecond housing 250 b are two rectangular parallelepipeds obtained by cutting the retractedmain body housing 250 in the center in a longitudinal direction thereof as shown inFIG. 6 . Thefirst housing 250 a is a square cylinder having theright side 256 and thesecond housing 250 b is a square cylinder having theleft side 255. In this example, thethird hosing 250 c is a square cylinder having an external shape slightly smaller than thefirst housing 250 a and thesecond housing 250 b. In this example, in a state in which themain body housing 250 is retracted as shown inFIG. 6 , thethird housing 250 c enters thefirst housing 250 a and thesecond housing 250 b. In a state in which themain body housing 250 is extended as shown inFIG. 7 , thethird housing 250 c is exposed from thefirst housing 250 a and thesecond housing 250 b. In other embodiments, thethird housing 250 c may be a square cylinder having an external shape slightly larger than thefirst housing 250 a and thesecond housing 250 b and may be connected to thefirst housing 250 a and thesecond housing 250 b to be exposed to the outside through the extension and retraction of themain body housing 250. -
FIG. 8 is a diagram for explaining details of the extending and retracting unit in themain body housing 250. Themain body housing 250 in a retracted state is shown in the upper part ofFIG. 8 . Themain body housing 250 in an extended state is shown in the lower part ofFIG. 8 . Thefirst housing 250 a includes aprojection 390 a and thesecond housing 250 b includes aprojection 390 b. Thethird housing 250 c includes afirst recess 391 and asecond recess 392. Theprojection 390 a of thefirst housing 250 a and theprojection 390 b of thesecond hosing 250 b are set in contact with thethird housing 250 c. Thefirst recess 391 of thethird housing 250 c fits with theprojection 390 a of thefirst housing 250 a and theprojection 390 b of thesecond housing 250 b to thereby locate thefirst housing 250 a and thesecond housing 250 b in a retracted position. Thesecond recess 392 of thethird housing 250 c fits with theprojection 390 a of thefirst housing 250 a and theprojection 390 b of thesecond housing 250 b to thereby locate thefirst housing 250 a and thesecond housing 250 b in an extended position. In other words, theprojections first recess 391, and thesecond recess 392 configure a holding unit that holds a state in which themain body housing 250 is extended or retracted. - In this example, the
first housing 250 a slides relatively to thethird housing 250 c by a distance SRa specified by a space between thefirst recess 391 and thesecond recess 392. Thesecond housing 250 b slides relatively to thethird housing 250 c by a distance SRb specified by a space between thefirst recess 391 and thesecond recess 392. Therefore, in this example, there are a first state (an extension/retraction distance=0) in which thefirst housing 250 a and thesecond housing 250 b are in the retracted position, a second state (an extension/retraction distance=SRa) in which only thefirst housing 250 a is in the extended position, a third state (an extension/retraction distance=SRb) in which only thesecond housing 250 b is in the extended position, and a fourth state (an extension/retraction distance=SRa+SRb) in which thefirst housing 250 a and thesecond housing 250 b are in the extended position. Themain body housing 250 can be extended and retracted according to the extension/retraction distances in four stages in total. - As shown in
FIG. 8 , theprojector 210 includes extension andretraction detecting units main body housing 250. In this example, the extension andretraction detecting unit 370 a is a pressing switch provided on a side of thethird housing 250 c connected to thefirst housing 250 a. The extension andretraction detecting unit 370 b is a pressing switch provided on a side of thethird housing 250 c connected to thesecond housing 250 b. In this example, in thefirst housing 250 a, apressing unit 393 a is provided in a position corresponding to the extension andretraction detecting unit 370 a of thethird housing 250 c. Thepressing unit 393 a presses the extension andretraction detecting unit 370 a in a state in which thefirst housing 250 a is in the retracted position. Thepressing unit 393 a separates from the extension andretraction detecting unit 370 a in a state in which thefirst housing 250 a is in the extended position. Similarly, in thesecond housing 250 b, apressing unit 393 b is provided in a position corresponding to the extension andretraction detecting unit 370 b of thethird housing 250 c. Thepressing unit 393 b presses the extension andretraction detecting unit 370 b in a state in which thesecond housing 250 b is in the retracted position. Thepressing unit 393 b separates from the extension andretraction detecting unit 370 b in a state in which thesecond housing 250 b is in the extended position. This makes it possible to detect extension/retraction distance of themain body housing 250 on the basis of a combination of ON and OFF of the switches in the extension andretraction detecting units -
FIG. 9 is a diagram for mainly explaining the detailed configuration of theprojector 210. Thelight source unit 220 a of theprojector 210 includes alight source 221 that radiates light. In this example, thelight source 221 is an ultra-high pressure mercury lamp (UHE lamp). However, in other embodiments, thelight source 221 may be a solid-state light source (e.g., a light emitting diode (LED) or a laser beam source). In this example, the configuration of thelight source unit 220 b is the same as that of thelight source unit 220 a. - In this example, the
image generating unit 230 a of theprojector 210 is a color separating and combining optical unit. Theimage generating unit 230 a separates light radiated from thelight source 221 into red light, green light, and blue light, modulates the respective lights, and then combines the lights as one light again to thereby generate projection light. Theimage generating unit 230 a includesintegrator lenses polarization converting element 233,dichroic mirrors light modulators dichroic prism 239. In this example, the number of spatial light modulators is three. However, in other embodiments, the number of spatial light modulators may be equal to or smaller than three or may be equal to or larger than three. In this example, the spatial light modulators are transmissive liquid crystal panels that modulate transmitted light. However, in other embodiments, a reflective liquid crystal panel that modulates reflected light may be used or a micro-mirror type light modulating device such as a digital micro-mirror device (DMD (registered trademark)) may be used. In this example, the configuration of theimage generating unit 230 b is the same as that of theimage generating unit 230 a. - The projection
optical unit 240 a of theprojector 210 includes afront lens 241, azoom lens 242, amaster lens 243, afocus lens 244, and aparallel glass 245. These lenses are arrayed in this order to configure a projection lens unit. In this example, thezoom lens 242 and thefocus lens 244 move back and forth along an optical axis of the projectionoptical unit 240 a. In this example, the projectionoptical unit 240 a further includes areflection mirror 248 that makes projection light from theimage generating unit 230 a incident on theparallel glass 245. - The
projector 210 further includes amain control unit 300, auser interface 330, animage input unit 340, spatial-light-modulation control units lens driving units imaging sensor 382. - The
user interface 330 of theprojector 210 receives instruction input from a user of theprojector 210. In this example, theuser interface 330 includes, in addition to plural buttons for receiving pressing input from the user, an infrared interface that receives infrared input from a remote controller. - The
image input unit 340 of theprojector 210 is connected to an external apparatus such as a personal computer and a digital image camera and receives the input of image data representing the image RP projected on thescreen 280. - The spatial-light-
modulation control units projector 210 controls the spatiallight modulators image generating units image input unit 340. In this example, the spatiallight modulators modulation control units - The
lens driving units projector 210 drive thezoom lenses 242 and thefocus lenses 244 of the projectionoptical units - The
imaging sensor 382 of theprojector 210 is an image sensor that captures an image of thescreen 280. In this example, theimaging sensor 382 is a CCD image sensor (Charge Coupled Device Image Sensor) as one of solid-state imaging devices. However, theimaging sensor 382 may be a CMOS image sensor (Complementary Metal Oxide Semiconductor image sensor). -
FIG. 10 is a diagram for explaining the detailed configuration of themain control unit 300. Themain control unit 300 of theprojector 210 controls the units of theprojector 210. Themain control unit 300 includes animage projecting unit 311 and animage adjusting unit 312. - The
image projecting unit 311 of themain control unit 300 executes image projection processing for projecting an image based on image data input from theimage input unit 340 on thescreen 280. The image projection processing is processing for generating two image data representing the partial images RPa and RPb on the basis of the image data input from theimage input unit 340. The image data representing the partial image RPa is output from themain control unit 300 to the spatial-light-modulation control unit 350 a. The image data representing the partial image RPb is output from themain control unit 300 to the spatial-light-modulation control unit 350 b. Consequently, projection light representing the partial image RPa is generated by theimage generating unit 230 a and projected on thescreen 280 from the projectionoptical unit 240 a. Projection light representing the partial image RPb is generated by theimage generating unit 230 b and projected on thescreen 280 from the projectionoptical unit 240 b. Portions corresponding to the overlapping area RPw in the partial images RPa and RPb are formed in a comb tooth shape or a mosaic shape to thereby complement each other to form one image such that the seam of the partial image RPa and the partial image RPb is not conspicuous. - The
image adjusting unit 312 of themain control unit 300 includes an expansion andreduction adjusting unit 313, an optical-axis adjusting unit 314, afocus adjusting unit 315, a keystone-distortion correction unit 316, and anunevenness adjusting unit 317. Theimage adjusting unit 312 executes image adjustment processing for adjusting an image projected on thescreen 280. - The expansion and
reduction adjusting unit 313 of theimage adjusting unit 312 performs expansion and reduction adjustment processing for expanding or reducing an image projected on thescreen 280 according to an extension/retraction distance of themain body housing 250 detected by the extension andretraction detecting units screen 280 by controlling thelens driving units main body housing 250 detected by the extension andretraction detecting units - The optical-
axis adjusting unit 314 of theimage adjusting unit 312 performs optical axis adjustment processing for moving optical axes of projection lights projected from the projectionoptical units main body housing 250 detected by the extension andretraction detecting units optical units lens driving units main body housing 250 detected by the extension andretraction detecting units - The
focus adjusting unit 315 of theimage adjusting unit 312 performs focus adjustment processing for moving focuses of the projection lights projected from the projectionoptical units main body housing 250 detected by the extension andretraction detecting units optical units lens driving units main body housing 250 detected by the extension andretraction detecting units - The keystone-
distortion correction unit 316 of theimage adjusting unit 312 performs keystone distortion adjustment processing for correcting a keystone distortion of an image projected on thescreen 280 according to the extension/retraction distance of themain body housing 250 detected by the extension andretraction detecting units main control unit 300 to the spatial-light-modulation control units main body housing 250 detected by the extension andretraction detecting units screen 280 with respect to theprojector 210. - The
unevenness adjusting unit 317 of thevideo adjusting unit 312 performs unevenness adjustment processing for obtaining uniform color reproducibility over the entire display area of the video RP by suppressing color unevenness and luminance unevenness between the partial video RPa and the partial video RPb. In this example, the unevenness adjustment processing is processing for correcting video data output from themain control unit 300 to the spatial-light-modulation control units imaging sensor 382. - In this example, the
main control unit 300 includes a central processing unit (hereinafter referred to as CPU) 310, amemory 320, and aninterface 303. TheCPU 310 of themain control unit 300 executes various kinds of processing on the basis of computer programs stored in thememory 320. Thememory 320 of themain control unit 300 stores data and computer programs treated by theCPU 310. Theinterface 303 of themain control unit 300 mediates input and output of signals between theCPU 310 and the units of theprojector 210. In this example, the functions of theimage projecting unit 311 and thevideo adjusting unit 312 are realized by theCPU 310 operating on the basis of software. However, in other embodiments, the functions may be realized by an electronic circuit of themain control unit 300 operating on the basis of a physical circuit configuration thereof. -
FIG. 11 is a diagram for mainly explaining the configuration of theprojector 210 viewed from thetop surface 251 of themain body housing 250. When viewed from thetop surface 251 of themain body housing 250, an optical axis APa of projection light projected from the projectionoptical unit 240 a inclines at an angle θa in a direction opposite to a direction in which the projectingunit 240 b adjacent to the projectionoptical unit 240 a is located. When viewed from thetop surface 251 of themain body housing 250, an optical axis APb of projection light projected from the projectionoptical unit 240 b inclines at an angle θb in a direction opposite to a direction in which the projectionoptical unit 240 a adjacent to the projectionoptical unit 240 b is located. Therefore, in this example, the optical axes APa and APb incline in the directions opposed to each other. - With the
projector 210 explained above, after positioning the plural projectionoptical units main body housing 250, a space between the plural projectionoptical units second housings third housing 250 c in themain body housing 250. As a result, it is possible to realize an increase in the size of an image projected on thescreen 280 while reducing a load for aligning the plural partial videos RPa and RPb respectively projected from the plural projectionoptical units - The
projections first recess 391, and thesecond recess 392 configure a holding unit that holds a state in which themain body housing 250 is extended or retracted. Consequently, since the plural projectionoptical units optical units - The
video adjusting unit 312 of themain control unit 300 adjusts the video RP projected on thescreen 280 according to an extension/retraction distance detected by the extension andretraction detecting units screen 280 is adjusted according to the space between the plural projectionoptical units optical units - The plural partial videos RPa and RPb are combined to project one video RP on the
screen 280. This makes it possible to realize an increase in the size of the video RP projected on thescreen 280 while reducing a load for aligning the plural partial videos RPa and RPb respectively projected from the plural projectionoptical units - The plural projection
optical units top surface 251 as the same plane in themain body housing 250. This makes it possible to reduce a load for aligning the plural partial videos RPa and RPb compared with a load applied when the plural projectionoptical units - The plural
image generating units optical units image generating units optical units main body housing 250. - The optical axis APa of the projection
optical unit 240 a inclines at the angle θa to the opposite side of the direction in which the projectionoptical unit 240 b is located. The optical axis APb of the projectionoptical unit 240 b inclines at the angle θb to the opposite side of the direction in which the projectionoptical unit 240 a is located. This makes it possible to project projection light on a wider range and realize an increase in the size of the video RP projected on thescreen 280. - The embodiment of the invention is explained above. However, the invention is not limited by the embodiment. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention. For example, the number of projecting units and imaging optical units is not limited to two and may be equal to or lager than three. Extending units that extend the
main body housing 250 may be provided among the projecting units. - In this example, the extending and retracting unit is formed by the connection structure of the first and
second housings third housing 250 c in themain body housing 250. However, in other embodiments, the extending and retracting unit may be formed by a repeated structure of a mountain fold and a valley fold (a bellows structure or an accordion structure) or an extension and retraction structure such as a slide rail or a pantograph. - In this example, the
main body housing 250 is extended and retracted in the two stages of holding the retracted state with thefirst recess 391 and holding the extended state with thesecond recess 392. However, in other embodiments, themain body housing 250 may be extended and retracted in positions in three or more stages. In this example, theprojections first housings first recess 391 and thesecond recess 392 are provided in thethird housing 250 c. However, in other embodiments, theprojections first housings first recess 391 and thesecond recess 392 of thethird housing 250 c may be replaced with projections. - In this example, the extension and
retraction detecting units main body housing 250 may be detected by a displacement sensor or a position sensor that detects the extension/retraction distance using magnetism or light. - In this example, the extending and retracting unit that extends or retracts the
main body housing 250 is manually operated by the user to extend or retract themain body housing 250. However, in other embodiments, the extending and retracting unit may extend or retract themain body housing 250 using an electric motor on the basis of an instruction of themain control unit 300. - In this example, the two
light source units image generating units image generating unit 230 a and theimage generating unit 230 b in common may be provided. This makes it possible to prevent lights supplied to the pluralimage generating units optical units - A plane for arranging the projecting units in the
main body housing 250 is not limited to thetop surface 251. The projecting units may be arranged on any one of thebottom surface 252, thefront surface 253, theback surface 254, theleft side 255, and theright side 256 according to the setting form of the projector, an external shape of the projector, relative positions of the projector and the screen, and the like or may be arranged over two or more planes. In this example, the projecting units and the imaging optical units are arranged substantially in a straight line. However, in other embodiments, the projecting units and the projection optical units may be arranged in a lattice shape in which vertical columns and horizontal columns cross each other. - The projecting units are not limited to projection lens units in which plural lenses are arrayed. The projecting units may be optical units that reflect projection lights generated by the imaging optical units to the
screen 280 using at least one of an aspherical lens, a magnifying lens, a diffusion glass, an aspherical mirror, and a reflection mirror. - In
FIGS. 6 and 7 , the video RP is projected in the state in which theprojector 210 is placed on the stand or the floor. However, the video RP may be projected in a state in which theprojector 210 is hung from the ceiling or may be projected in a state in which theprojector 210 is set on the wall. -
FIG. 12 is a diagram for explaining a schematic configuration of an image projection system as an example of the invention. Animage projection system 500 projects an image and an image on ascreen 490 and outputs sound using thescreen 490. In this example, thescreen 490 is drawn out from the inside of amain body housing 415, unwound, and used. In the example shown inFIG. 12 , the video RP projected by theimage projection system 500 is an image obtained by joining the two partial images RPa and RPb. The overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in the seam of the partial image RPa and the partial image RPb. - The
image projection system 500 includes themain body housing 415, a projectingunit 410, ascreen 490, ascreen winding unit 480, an oscillating-element-for-speaker driving unit 450, and anexternal interface unit 470. Themain body housing 415 has a hexahedron shape and has threeopenings - The projecting
unit 410 is a projector arranged in themain body housing 415 and has the structure formed by combining two projecting mechanisms. Specifically, the projectingunit 410 includes two light source units (a firstlight source unit 420 a and a secondlight source unit 420 b), two imaging optical unit (a first imagingoptical unit 430 a and a second imagingoptical unit 430 b), two projection optical units (a first projectionoptical unit 440 a and a second projectionoptical unit 440 b), and acontrol unit 460. The detailed configuration of the projectingunit 410 is explained later. With such structure, the projectingunit 410 emits image light from the twoopenings FIG. 12 , the first projectionoptical unit 440 a emits image light from theopening 416 x and projects the partial image RPa on thescreen 490. Similarly, the second projectionoptical unit 440 b emits image light from theopening 416 y and projects the partial image RPb on thescreen 490. - The
screen 490 is formed of a sheet-like member that can be wound. Specifically, thescreen 490 has the structure obtained by superimposing two sheets. Of the two sheets, a sheet forming a projection area on which an image (a video) is projected when the sheet is unwound is formed as a diffusion type screen with the surface processed into a white mat. One end of thescreen 490 is connected to ascreen winding unit 480 and the other end is connected to acolumnar support member 492. Thescreen 490 can be wound and housed in themain body housing 415. When thescreen 490 is housed, thesupport member 492 is present in the position of theopening 416 z. When a user attempts to project an image (a video), the user can draw out thescreen 490 from theopening 416 z by pulling thesupport member 492 in a +Z direction. When thescreen 490 is drawn out to the maximum, thescreen winding unit 480 maintains an unwound state. - Plural
oscillating elements 495 for a speaker are arranged at a predetermined interval between the two sheets included in thescreen 490. In the example shown inFIG. 12 , three columns in total each including sixoscillating elements 495 are formed in the center and at both the ends of thescreen 490. In each of the columns, theoscillating elements 495 are arranged at the predetermined interval along a Z direction. Theoscillating elements 495 are bonded to thescreen 490. Arrangement positions of theoscillating elements 495 in thescreen 490 are fixed. Each of theoscillating elements 495 includes an excitation plate, an oscillator, and a voice coil that surrounds the oscillator (all of which are not shown in the figure). Theoscillating elements 495 cause the oscillator to oscillate on the basis of an input electric signal and transmits this oscillation to thescreen 490 via the excitation plate. Thescreen 490 oscillates according to the oscillation transmitted from the excitation plate (not shown in the figure) and outputs sound. - The
screen winding unit 480 includes a not-shown torsion spring and can wind the unwoundscreen 490. Specifically, in a state in which thescreen 490 is drawn out to the maximum, when the user further pulls thesupport member 492 in the +Z direction, thescreen winding unit 480 winds thescreen 490 into themain body housing 415 using urging force of the torsion spring (not shown in the figure). As a specific configuration for such winding and unwinding of thescreen 490, the publicly-known configuration (e.g., the configuration described in JP-A-9-279967) can be adopted. - The oscillating-element-for-
speaker driving unit 450 is connected to theoscillating elements 495 and transmits sound signal to theoscillating elements 495. Theexternal interface unit 470 is provided on the side 417 of themain body housing 415 and includes an interface for inputting sound and images and a button group for user operation. -
FIG. 13 is a diagram for explaining theimage projection system 500 taken along A-A section inFIG. 12 . The first projectionoptical unit 440 a emits image light from theopening 416 x downward to the right. An emitting direction of the image light is set in advance such that a projected image (video) does not extend beyond thescreen 490 in a state in which thescreen 490 is unwound most. - The
screen winding unit 480 is formed in a cylindrical shape. In the example shown inFIG. 12 , a part of thescreen 490 is wound by thescreen winding unit 480. The oscillating-element-for-speaker driving unit 450 and thescreen winding unit 480 are electrically connected. Thescreen winding unit 480 and theoscillating elements 495 are electrically connected. Therefore, the oscillating-element-for-speaker driving unit 450 is electrically connected to theoscillating elements 495 via thescreen winding unit 480. -
FIG. 14 is a diagram for explaining the detailed configuration of theimage projection system 500. Theimage projection system 500 includes acontrol unit 460 in addition to themain body housing 415, the projecting unit 410 (thecontrol unit 460, the twolight source units optical units optical units screen 490, thescreen winding unit 480, the oscillating-element-for-speaker driving unit 450, and theexternal interface unit 470. - The
control unit 460 includes aninput interface unit 465, aCFU 461, a ROM 466, and aRAM 467. Theinput interface unit 465 converts an input sound signal or image signal into a format processable by theCPU 461. A projection control program is stored in the ROM 466. TheCPU 461 executes the projection control program to thereby function as amain control unit 462, two liquid crystal panel driving units (a first liquid-crystal-panel driving unit 463 a and a second liquid-crystal-panel driving unit 463 b), and an oscillating-element-for-speaker control unit 464. Themain control unit 462 executes overall control of theimage projection system 500. The two liquid-crystal-panel driving units speaker control unit 464 controls the oscillating-element-for-speaker driving unit 450. Specifically, the oscillating-element-for-speaker control unit 464 instructs the oscillating-element-for-speaker driving unit 450 what kind of sound signal should be given to theoscillating elements 495. The oscillating-element-for-speaker driving unit 450 amplifies a sound signal transmitted from the oscillating-element-for-speaker control unit 464 and transmits the sound signal to theoscillating elements 495 via thescreen winding unit 480 andinternal wiring 496. Thescreen winding unit 480 is connected to theoscillating elements 495 via theinternal wiring 496. Theinternal wiring 496 is arranged between the two sheets included in thescreen 490. - The
external interface unit 470 includes auser interface unit 471, a soundsignal receiving unit 472, and an imagesignal receiving unit 473. Theuser interface unit 471 includes operation buttons and an operation panel (not shown in the figure) and enables display of a menu screen and operation by the user. Theuser interface unit 471 includes an infrared interface that receives infrared input from a not-shown remote controller. The soundsignal receiving unit 472 includes terminals for sound input (e.g., a RCA terminal and an optical digital terminal). The imagesignal receiving unit 473 includes terminals for image input (e.g., an S terminal and a D terminal). All of theuser interface unit 471, the soundsignal receiving unit 472, and the imagesignal receiving unit 473 are connected to theinput interface unit 465. - The first
light source unit 420 a includes a light source lamp and a reflector not shown in the figure and emits illumination light to the first imagingoptical unit 430 a. As the light source lamp, for example, an ultra-high pressure mercury lamp (UHE lamp) and a light emitting diode (LED) can be adopted. The first imagingoptical unit 430 a includes a firstliquid crystal panel 432 a and modulates the illumination light into image light. Not only a liquid crystal panel but also an arbitrary light modulating device can be used. For example, a digital micro-mirror device (DMD (registered trademark)) can also be used. - The first imaging
optical unit 430 a includes an integrator lens, a dichroic mirror, and a dichroic prism (all of which are not shown in the figure) and transmits the image light to the first projectionoptical unit 440 a. The first projectionoptical unit 440 a includes a not-shown projection lens and emits the image light in a direction decided in advance (seeFIG. 13 ). The secondlight source unit 420 b has a configuration same as that of the firstlight source unit 420 a explained above. Similarly, the second imagingoptical unit 430 b has a configuration same as that of the first imagingoptical unit 430 a. The second projectionoptical unit 440 b has a configuration same as that of the first projectionoptical unit 440 a. The second imagingoptical unit 430 b includes a secondliquid crystal panel 432 b. - The projecting
unit 410 is equivalent to a projector in claims. A set including the firstlight source unit 420 a, the first imagingoptical unit 430 a, and the first projectionoptical unit 440 a and a set including the secondlight source unit 420 b, the second imagingoptical unit 430 b, and the second projectionoptical unit 440 b are equivalent to a projecting mechanism in claims. A side connected to thesupport member 492 and a side formed by theopening 416 z in thescreen 490 are equivalent to “two opposed sides, length of which is not changed by winding and unwinding of the sheet-like screen” in claims. - When an image signal is input from an apparatus (e.g., a DVD player or a personal computer) connected to the image signal receiving unit 473 (
FIG. 14 ), the input interface unit 465 A/D (analog/digital)-converts the input image signal, converts the image signal into image data of a predetermined format, and stores the image data in theRAM 467. - The
main control unit 462 generates partial images on the basis of the image data stored in theRAM 467 and transmits the image data of the partial images to the two liquid-crystal-panel driving units main control unit 462 transmits image data of the partial image RPa (FIG. 12 ) to the first liquid-crystal-panel driving unit 463 a and transmits image data of the partial image RPb to the second liquid-crystal-panel driving unit 463 b. Generation of the partial images RPa and RPb can be executed by using, for example, data of pixels in a predetermined range among the image data stored in theRAM 467. In generating the image data of the partial images RPa and RPb, themain control unit 462 generates the overlapping area RPw as, for example, an image of a comb tooth shape or a mosaic shape. This allows the two partial images RPa and RPb to complement each other to form one image such that the seam thereof is not conspicuous. Themain control unit 462 transforms the shape of an image and performs so-called keystone correction. The first liquid-crystal-panel driving unit 463 a drives the firstliquid crystal panel 432 a on the basis of the received image data of the partial images. Similarly, the second liquid-crystal-panel driving unit 463 b drives the secondliquid crystal panel 432 b on the basis of the received image data of the partial images. - The first
liquid crystal panel 432 a modulates illumination light emitted from the firstlight source unit 420 a and generates image light on the basis of a signal received from the first liquid-crystal-panel driving unit 463 a. As explained above, the first projectionoptical unit 440 a emits the image light and the partial image RPa (FIG. 12 ) is shown on thescreen 490. Similarly, the secondliquid crystal panel 432 b modulates illumination light emitted from the secondlight source unit 420 b and generates image light on the basis of a signal received from the second liquid-crystal-panel driving unit 463 b. The second projectionoptical unit 440 b emits the image light and the partial image RPb is shown on thescreen 490. In the two projectionoptical units screen 490 unwound to the maximum. - When a sound signal is input from an apparatus connected to the sound signal receiving unit 472 (
FIG. 14 ), the input interface unit 465 A/D (analog/digital)-converts the input sound signal. The oscillating-element-for-speaker control unit 464 generates a sound signal given to theoscillating elements 495 on the basis of sound data after the digital conversion. The oscillating-element-for-speaker driving unit 450 transmits an electric signal for driving to theoscillating elements 495 on the basis of the sound signal generated by the oscillating-element-for-speaker control unit 464. Theoscillating elements 495 cause thescreen 490 to oscillate on the basis of the received driving signal. In this way, sound is output from theentire screen 490 in time to the image shown on thescreen 490. -
FIGS. 15A , 15B, 15C, and 15D are diagrams for explaining arrangement examples of theimage projection system 500. Four arrangement examples (arrangement examples 1 to 4) are respectively shown in the figures. In the arrangement example 1, themain body housing 415 is set on a wall surface such that a longitudinal direction thereof is parallel to the vertical direction. The setting on the wall surface can be realized by, for example, setting a support fitting (not shown in the figure) on the wall surface in advance and, in attempting to project an image (a video), attaching themain body housing 415 to the support fitting. In the arrangement example 1, the user can draw out thescreen 490 sideways (in the right direction) and unwind thescreen 490. The unwound state of thescreen 490 can be maintained by attaching thesupport member 492 to a hook (not shown in the figure) provided on the wall surface. - In the arrangement example 2, the
main body housing 415 is arranged on the wall surface such that the longitudinal direction is parallel to the horizontal direction. In the arrangement example 2, the user can slide thescreen 490 downward and unwind thescreen 490. A method of setting themain body housing 415 in the arrangement example 2 can be the same as that in the arrangement example 1. In the arrangement example 3, themain body housing 415 is set on a floor or a desk. In the arrangement example 3, the user can draw out thescreen 490 upward and unwind thescreen 490. A method of maintaining the unwound state of thescreen 490 can be the same as that in the arrangement example 1. - In the arrangement example 4, the
main body housing 415 is set on a top plate of adesk 499. In the arrangement example 4, the user can draw out thescreen 490 in parallel to the top plate of thedesk 499. Unlike the arrangement examples 1 and 3, the unwound state of thescreen 490 can be maintained unless thesupport member 492 is attached to the hook (not shown in the figure). In the arrangement example 4, the user can easily project an image by drawing out thescreen 490 placing the carried image projection system 500 (the main body housing 415) on the desk. In the arrangement example 4, a person who views an image can view the image in the manner of looking down thescreen 490 while standing around the desk. - As explained above, in the
image projection system 500 in the example C1, the projecting unit (the projector) can be arranged in themain body housing 415 and thescreen 490 can be wound and housed in themain body housing 415. Therefore, the user can easily carry the projecting unit (the projector) and thescreen 490. The projectionoptical units screen 490 is unwound to the maximum. Therefore, the user does not have to perform adjustment for projection. Consequently, even when the image projection system 500 (the main body housing 415) is arranged in various positions, the user can easily set a positional relation between the projector and thescreen 490 in a suitable state simply by drawing out thescreen 490. - In the
image projection system 500, since thescreen 490 functions as the speaker, it is possible to easily construct an environment for sound reproduction compared with a configuration in which a speaker device is prepared separately from theimage projection system 500. Since thescreen 490 is caused to function as the speaker, it is possible to secure a large acoustic area and perform large-volume sound output. Since theoscillating elements 495 are arranged in the inside of thescreen 490, it is possible to make it easy to wind thescreen 490 compared with a configuration in which theoscillating elements 495 are arranged on the front surface or the rear surface of thescreen 490. Further, in theimage projection system 500, since the projecting mechanisms (the twolight source units optical units optical units main body housing 415. A large space can be secured between two image lights by arrange the projecting mechanisms to line up in a straight line. Therefore, even if a projecting distance between themain body housing 415 and thescreen 490 is small, it is possible to project the image RP in a large size. The two projectionoptical units -
FIG. 16 is a diagram for explaining a schematic configuration of an image projection system in an example C2. Animage projection system 500 a in the example C2 is different from theimage projection system 500 in the example C1 (FIG. 12 ) in that projecting units (projectors) are provided at both the ends of thescreen 490 and in that an image is divided into four and projected. Otherwise, theimage projection system 500 a is the same as theimage projection system 500 in the example C1. - Specifically, a second
main body housing 415 b that houses a second projectingunit 410 a is arranged to be opposed to the main body housing 415 (in this example, hereinafter referred to as first main body housing 415) across thescreen 490. The second projectingunit 410 a has a configuration same as that of the projecting unit 410 (in this example, hereinafter referred to as first projecting unit 410). Thesupport member 492 is fixed in the firstmain body housing 145. A user can unwind thescreen 490 by moving the secondmain body housing 415 b in the +Z direction. The firstmain body housing 415 and functional units housed in the firstmain body housing 415 are referred to asfirst projection unit 550 a. The secondmain body housing 415 b and functional units housed in the secondmain body housing 415 b are referred to assecond projection unit 550 b. - The
image projection system 500 a projects four partial images on thescreen 490 and joins the partial images to project one image. In the example shown inFIG. 16 , theimage projection system 500 a joins four partial images RP1 to RP4 to project the image RP. Processing same as that in the example C1 is applied to an overlapping area where the partial images overlap one another to prevent a seam of the partial images from becoming conspicuous. -
FIG. 17 is a diagram for explaining the detailed configuration of thefirst projection unit 550 a shown inFIG. 16 . Thefirst projection unit 550 a is different from theimage projection system 500 in the example C1 (FIG. 14 ) in that asignal line 498 is embedded in the inside of thescreen 490 and in that thesignal line 498 is connected to theCPU 461 via thescreen winding unit 480. Otherwise, thefirst projection unit 550 a is the same as theimage projection system 500. Thesignal line 498 mediates exchange of signals between thefirst projection unit 550 a and thesecond projection unit 550 b. -
FIG. 18 is a diagram for explaining the detailed configuration of thesecond projection unit 550 b shown inFIG. 16 . Thesecond projection unit 550 b is different from thefirst projection unit 550 a (FIG. 17 ) in seven points explained below. Otherwise, thesecond projection unit 550 b is the same as thefirst projection unit 550 a. The differences are that thesecond projection unit 550 b does not include theexternal interface unit 470, does not include theinput interface unit 465, does not include the oscillating-element-for-speaker driving unit 450, does not include the oscillating-element-for-speaker control unit 464, does not include theinternal wiring 496 and thesecond projection unit 550 b includes thesupport member 492 as explained above and includes asub-control unit 462 a instead of themain control unit 462. - The
second projection unit 550 b includes a thirdlight source unit 421 a corresponding to the firstlight source unit 420 a in thefirst projection unit 550 a. Similarly, thesecond projection unit 550 b includes a third imagingoptical unit 431 a corresponding to the first imagingoptical unit 430 a, a thirdliquid crystal panel 433 a corresponding to the firstliquid crystal panel 432 a, a third projectionoptical unit 441 a corresponding to the first projectionoptical unit 440 a, a fourthlight source unit 421 b corresponding to the secondlight source unit 420 b, a fourth imagingoptical unit 431 b corresponding to the second imagingoptical unit 430 b, a fourthliquid crystal panel 433 b corresponding to the secondliquid crystal panel 432 b, and a fourth projectionoptical unit 441 b corresponding to the second projectionoptical unit 440 b. - In the
second projection unit 550 b, acontrol unit 485 includes aCPU 486, a ROM 468, and aRAM 469. TheCPU 486 executes a program for projection control stored in the ROM 468 to thereby function as asub-control unit 462 a, a third liquid-crystal-panel driving unit 464 a, and a fourth liquid-crystal-panel driving unit 464 b. Thesignal line 498 is connected to theCPU 486 via thesupport member 492. - The
sub-control unit 462 a executes overall control of thesecond projection unit 550 b. However, themain control unit 462 in thefirst projection unit 550 a generates image (video) data. Thesub-control unit 462 a receives the image (video) data from themain control unit 462 via thesignal line 498 and supplies the image (video) data to the two liquid-crystal-panel driving units - The
image projection system 500 a in the example C2 explained above realizes effects same as those of theimage projection system 500 in the example C1. Since the image RP is divided into four and projected by using the four projecting mechanisms, even when a distance between thescreen 490 and each of the projectionoptical units -
FIG. 19 is a diagram for explaining a schematic configuration of an image projection system in an example C3. Animage projection system 500 b in the example C3 is different from the image projection system 500 (FIG. 12 ) in a setting position of oscillating elements for a speaker. Otherwise, theimage projection system 500 b is the same as theimage projection system 500 in the example C1. - Specifically, the
image projection system 500 b does not include theoscillating elements 495 in the inside of ascreen 490 a. Therefore, thescreen 490 a is formed by one sheet. Theimage projection system 500 b includes anacoustic unit 497 in the inside of themain body housing 415. Theacoustic unit 497 includes a speaker cone, oscillation elements for a speaker, and a voice coil (all of which are not shown in the figure). Theacoustic unit 497 outputs sound according to an input electric signal from the oscillation-element-for-speaker driving unit 450. Anopening 416 u for a speaker is provided in the front surface W16 of themain body housing 415 in addition to the threeopenings -
FIG. 20 is a diagram for explaining theimage projection system 500 b taken along B-B section inFIG. 19 . As in the example C1, in this example, thescreen 490 a functions as a part of a speaker. Specifically, theacoustic unit 497 outputs sound downward to the right. Thescreen 490 a reflects the sound output from theacoustic unit 497 and outputs the sound to a viewer. - The
image projection system 500 b in the example C3 explained above realizes effects same as theimage projection system 500 in the example C1. Since oscillating elements are not embedded in thescreen 490 a, the diameter of thescreen 490 a can be reduced when thescreen 490 a is wound. Therefore, it is possible to reduce a space for housing thescreen 490 a in themain body housing 415 and reduce the size of the entireimage projection system 500 b. -
FIG. 21 is a diagram for explaining a schematic configuration of an image projection system in an example C4. Animage projection system 500 c in the example C4 is different from the image projection system 500 (FIG. 12 ) in that a surface from which light is emitted among the surfaces of themain body housing 415 is the top surface. Otherwise, theimage projection system 500 c is the same as theimage projection system 500 in the example C1. - Specifically, the first projection
optical unit 440 a in the example C4 is configured by rotating the first projectionoptical unit 440 a in theimage projection system 500 in the example C1 (FIG. 12 ) 90 degrees with an X axis as a rotation axis. Similarly, the second projectionoptical unit 440 b in the example C4 is configured by rotating the second projectionoptical unit 440 b in theimage projection system 500 in the example C1 (FIG. 12 ) 90 degrees with the X axis as the rotation axis. - Two
openings main body housing 415. Two projection mirrors 419 a and 419 b are provided in themain body housing 415. Theprojection mirror 419 a has a rectangular shape and the rear surface of theprojection mirror 419 a is formed as a mirror. The lower side of theprojection mirror 419 a is set in contact with one side (a side parallel to the X axis) of the opening 418 a. Theprojection mirror 419 a is attached to themain body housing 415 to be rotatable with the lower side as an axis. A user can reflect image light using the mirror of the rear surface by lifting theprojection mirror 419 a. The user can close the opening 418 a using theprojection mirror 419 a by pushing up theprojection mirror 419 a to be parallel to the top surface W18. Theprojection mirror 419 b has a configuration same as that of theprojection mirror 419 a. - In the example shown in
FIG. 21 , image light emitted upward from the first projectionoptical unit 440 a is reflected by theprojection mirror 419 a and travels to thescreen 490. The partial image RPb is shown on thescreen 490 by the image light. Similarly, image light emitted upward from the second projectionoptical unit 440 b is reflected by theprojection mirror 419 b and travels to thescreen 490. The partial image RPa is shown on thescreen 490 by the image light. - The
image projection system 500 c in the example C4 explained above realizes effects same as those of theimage projection system 500 in the example C1. The image lights emitted from the two projectionoptical units screen 490. Therefore, it is possible to increase a projection distance of the image lights (an optical distance from the two projectionoptical units screen 490. - Elements other than elements claimed in independent claims among the components in the examples are additional elements and can be omitted as appropriate. The invention is not limited to the examples and the embodiments. The invention can be carried out in various forms without departing from the spirit of the invention. For example, modifications explained below are also possible.
- In the example C1, the total number of
oscillating elements 495 is eighteen. However, the number can be an arbitrary number. Theimage projection system 500 can adopt a configuration including nooscillating element 495. Even in such a configuration, since thescreen 490 is wound and housed in the inside of themain body housing 415, the user can easily carry the projecting unit (the projector) and thescreen 490. The user does not have to perform adjustment for projecting an image (a video) in a suitable state (size and focus). - In the examples C1, C2, and C4, the
oscillating elements 495 are arranged in the inside of thescreen 490. However, instead, theoscillating elements 495 can also be arranged on the front surface or the rear surface of thescreen 490. Theoscillating elements 495 are arranged in the area where the image RP is shown. However, instead, theoscillating elements 495 can also be arranged in other areas. For example, theoscillating elements 495 can also be arranged in a margin area where the image RP is not shown in an area exposed by unwinding in thescreen 490. A relatively large oscillating element (an actuator that oscillates the entire screen 490) can also be arranged in an area of thescreen 490 unwound in the inside of themain body housing 415. Even in such a configuration, it is possible to cause theentire screen 490 to function as a speaker. In other words, in general, the image projection system of the invention can adopt an arbitrary screen functioning as a speaker employing oscillating elements. - In the examples explained above, the number of projecting units (projectors) is one (the examples C1, C3, and C4) or two (the example C2). However, the number of projecting units is not limited to this and can be an arbitrary number. In other words, in general, the image projection system of the invention can adopt a configuration including an arbitrary number of projectors. The number of projecting mechanisms included in each of the projecting units can also be an arbitrary number. When the number of projecting units (projectors) is one and the number of projecting mechanisms is one, configuration for projecting an image without dividing the image can be adopted. When the projecting unit includes plural projecting mechanisms, an image can be projected without being divided. In this case, it is possible to emit image lights of different images from the projecting mechanisms and project plural images (videos).
- In the example C2, the
first projection unit 550 a and thesecond projection unit 550 b include the same number of (one) projecting unit (projector). However, instead, thefirst projection unit 550 a and thesecond projection unit 550 b can respectively include different numbers of projecting units. For example, thefirst projection unit 550 a can include one projecting unit and thesecond projection unit 550 b can include two projecting units. In other words, in general, the image projection system of the invention can adopt an arbitrary configuration in which plural projecting units (projectors) are provided, the plural projecting units are arranged in a distributed manner on two opposed sides, length of which is not changed by winding or unwinding, in an unwound area (a projection area) in the screen. - In the examples, the two projection
optical units optical units light source units optical unit 430 a and the second imagingoptical unit 430 b by using a prism or an optical fiber. - In the examples explained above, the projecting mechanisms (the light source units, the imaging optical units, and the projection optical units) are arranged to line up in a straight line. However, an arrangement form of the projecting mechanisms is not limited to this. The projecting mechanisms can adopt an arbitrary arrangement form. For example, the functional units included in the projecting mechanisms can also be arranged in a lattice shape in which vertical columns and horizontal columns cross each other.
- In the examples explained above, the projection
optical units screen 490 unwound to the maximum. However, the invention is not limited to this. For example, it is also possible to automatically adjust, according to the size of an area exposed by unwinding in thescreen 490, the size, the aspect ratio, and the focus position of an image to be projected. Specifically, thescreen 490 is configured to maintain a state of being unwound in an arbitrary position. Thescreen winding unit 480 is configured to detect the length (the length in the Z direction) of thescreen 490 let out by the unwinding and notify themain control unit 462 of the length. Themain control unit 462 is configured to adjust the size and the aspect ratio of an image and perform focus adjustment on the basis of the notified let-out amount of thescreen 490. A correspondence relation between the led-out amount of thescreen 490 and suitable size and aspect ratio of the image and a relation between the let-out amount of thescreen 490 and a suitable focus adjustment amount are calculated by experiments in advance and stored in the ROM 466 as a table. Themain control unit 462 can also be configured to determine, with the notified let-out amount of thescreen 490 as a key, the size, the aspect ratio, and the focus adjustment amount of the image referring to the table. - In the examples explained above, the sheet on the side on which an image (a video) is projected is formed as the diffusion screen, the surface of which is processed into the white mat. However, instead, the sheet can also be formed as other types of screens. For example, the sheet can also be formed as a diffusion screen, the surface of which is processed into a gray mat or a white recursive screen, the surface of which is inlaid with beads.
- In the examples explained above, the
screens screen winding unit 480. However, instead, thescreens screen winding unit 480 can also include a handle for winding thescreens screen 490. However, the shape of the projection area is not limited to the rectangular shape and can be formed in an arbitrary shape. - In the examples explained above, the
image projection systems image projection systems - In the examples explained above, the overlapping area is provided in the generation of the partial images RPa and RPb (RP1 to RP4). However, instead, it is also possible to generate the partial images without providing the overlapping area. In this case, it is desirable to adjust emitting directions of image lights in the projection
optical units screen 490. - In the examples explained above, a part of the configuration realized by hardware may be replaced with software. Conversely, a part of the configuration realized by software may be replaced with hardware.
-
FIG. 22 is a diagram for explaining a state in which aprojector 710 attached to astand 760 is set.FIG. 23 is a diagram for explaining a state in which theprojector 710 attached to thestand 760 is carried. Aprojector system 701 includes theprojector 710, thestand 760, and ascreen 780. - The
projector 710 of theprojector system 701 is set on thestand 760 and projects the image RP on thescreen 780. Thescreen 780 of theprojector system 701 is a plane on which the image RP is displayed. Thescreen 780 may be a movie screen or may be a wall surface. Theprojector 710 includes amain body housing 750 that houses various components of theprojector 710. Themain body housing 750 is integrally connected to thestand 760. In this example, themain body housing 750 of theprojector 710 has a substantially square pole shape. The image RP is projected on thescreen 780 in a state in which the square pole lies sideways. The detailed configuration of theprojector 710 is explained later. - The
stand 760 of theprojector system 701 can be transformed into a setting form and a carrying form. As shown inFIG. 22 , in the setting form, thestand 760 functions as a projector table on which theprojector 710 is set. As shown inFIG. 23 , in the carrying form, thestand 760 functions as a carrying device for carrying theprojector 710. Thestand 760 includes apedestal 610 on which theprojector 710 is installed, afirst support leg 620 that supports thepedestal 610, ahandle 630 provided in thefirst support leg 620, asecond support leg 640 that supports thepedestal 610 in cooperation with thefirst support leg 620, andwheels 650 provided in thesecond support leg 640. - In the
stand 760, thefirst support leg 620 and thesecond support leg 640 are connected to be foldable to thepedestal 610. In the setting form shown inFIG. 22 , thefirst support leg 620 and thesecond support leg 640 are fixed in a state drawn out from thepedestal 610, thefirst support leg 620 is set in contact with the ground via thehandle 630 to support thepedestal 610, and thesecond support leg 640 is set in contact with the ground via thewheels 650 to support thepedestal 610. In the carrying form shown inFIG. 23 , thefirst support leg 620 and thesecond support leg 640 are fixed in a state folded to thepedestal 610 and thehandle 630 and thewheels 650 project from thepedestal 610. In a state in which thestand 760 is transformed into the carrying form, it is possible to carry theprojector 710 by gripping thehandle 630 and tugging thestand 760 while keeping thewheels 650 set in contact with the ground. -
FIG. 24 is a diagram for explaining the detailed configuration of thestand 760 in the setting form viewed from a direction opposed to thescreen 780.FIG. 25 is a diagram for mainly explaining the detailed configuration of thestand 760 transformed from the state shown inFIG. 24 into the carrying form.FIG. 26 is a diagram for explaining the detailed configuration of thestand 760 in the carrying form shown inFIG. 25 viewed from a floor surface FS. - As shown in
FIG. 24 , thepedestal 610 of thestand 760 is fixed to themain body housing 750 of theprojector 710 byscrews 618. Thepedestal 610 has a shape matching themain body housing 750 of theprojector 710. In this example, as shown inFIG. 26 , thepedestal 610 has a substantially rectangular shape including long side surfaces 611 and 612 and short side surfaces 613 and 614. Thefirst support leg 620 is rotatably connected to theshort side surface 614 side in thepedestal 610 via a connectingshaft 622 substantially parallel to the short side surfaces 613 and 614. Thesecond support leg 640 is rotatably connected to theshort side surface 613 side opposed to theshort side surface 614 via a connectingshaft 642 substantially parallel to the short side surfaces 613 and 614. - As shown in
FIG. 24 , thefirst support leg 620 and thesecond support leg 640 of thestand 760 rise from the floor surface FS and support thepedestal 610 in cooperation with each other. Thefirst support leg 620 is a columnar member, at one end of which thehandle 630 is formed. The end on the opposite side of thehandle 630 is rotatably connected to thepedestal 610 via the connectingshaft 622. Thefirst support leg 620 is foldable to the connectingshaft 642, which is a second connecting unit, generally along the long side surfaces 611 and 612 in a longitudinal direction of thepedestal 610. Thesecond support leg 640 is a structure formed by connecting two columnar members at ends thereof. Thewheels 650 are formed at one end of thesecond support leg 640. The end on the opposite side of thewheels 650 is rotatably connected to thepedestal 610 via the connectingshaft 642. Thesecond support leg 640 is foldable to the connectingshaft 622, which is a first connecting unit, generally along the long side surfaces 611 and 612 in the longitudinal direction of thepedestal 610. - The
first support leg 620 and thesecond support leg 640 cross each other in both the setting form and the carrying form in a state in which the columnar member of thefirst support leg 620 is held between the two columnar members in thesecond support leg 640. In thefirst support leg 620, a fixingpin 626 projecting to thesecond support leg 640 is formed in a region where thefirst support leg 620 crosses thesecond support leg 640 in the setting form. In thesecond support leg 640, a fixinggroove 646 that fits with the fixingpin 626 of thefirst support leg 620 is formed in a region where thesecond support leg 640 crosses thefirst support leg 620 in the setting form. By fitting the fixingpin 626 of thefirst support leg 620 and the fixinggroove 646 of thesecond support leg 640 each other, it is possible to fix thefirst support leg 620 and thesecond support leg 640 in a position where thehandle 630 and thewheels 650 are set away from thepedestal 610. - As shown in
FIG. 24 , thehandle 630 of thestand 760 comes into contact with the floor surface FS when thepedestal 610 is supported in the setting form. As shown inFIGS. 25 and 26 , thehandle 630 projects from theshort side surface 613 in thepedestal 610 in a state in which thefirst support leg 620 is folded in the carrying form. Thehandle 630 has a bar-like section 632 having thickness that a human can grip by hand. In this example, thehandle 630 is a square frame member. However, in other embodiments, thehandle 630 may be other polygonal and circular frame members or may be a T-shaped frame member. The bar-like section 632 of thehandle 630 is formed substantially parallel to the short side surfaces 613 and 614 of thepedestal 610. - As shown in
FIG. 24 , thewheels 650 of thestand 760 come into contact with the floor surface FS when thepedestal 610 is supported in the setting form. As shown inFIGS. 25 and 26 , thewheels 650 project from theshort side surface 614 in thepedestal 610 in a state in which thesecond support leg 640 is folded in the carrying form. Thewheels 650 have awheel shaft 652 that rotatably connects thewheels 650 to thesecond support leg 640. Thewheel shaft 652 of thewheels 650 is provided substantially parallel to the short side surfaces 613 and 614 of thepedestal 610 and is also substantially parallel to the bar-like section 632 of thehandle 630. -
FIG. 27 is a diagram for mainly explaining an external configuration of theprojector 710. Theprojector 710 includeslight source units optical units units screen 780. - The
light source units projector 710 include ultra-high pressure mercury lamps (UHF lamps) as light sources. In other embodiments, thelight source units - In this example, the imaging
optical units projector 710 are color separating and combining optical units. The imagingoptical units light source units optical units - The projecting
units projector 710 include projection lens units in which plural lenses such as a front lens, a zoom lens, a master lens, and a focus lens are arrayed. In other embodiments, the projectingunits optical units screen 780 using at least one of an aspherical lens, a magnifying lens, a diffusion glass, an aspherical mirror, and a reflection mirror. - The image RP projected by the
projector 710 is an image formed by joining the two partial images RPa and RPb. The overlapping area RPw where the two partial images RPa and RPb overlap each other is formed in the seam of the partial image RPa and the partial image RPb. The partial image RPa in the image RP is projected by using thelight source unit 720 a, the imagingoptical unit 730 a, and the projectingunit 740 a. Specifically, light radiated from thelight source unit 720 a is projected on thescreen 780 from the projectingunit 740 a after being modulated into projection light representing the partial image RPa by the imagingoptical unit 730 a. The partial image RPb in the image RP is projected by using thelight source unit 720 b, the imagingoptical unit 730 b, and the projectingunit 740 b. Specifically, light radiated from thelight source unit 720 b is projected on thescreen 780 from the projectingunit 740 b after being modulated into projection light representing the partial image RPb by the imagingoptical unit 730 b. - The
main body housing 750 of theprojector 710 houses thelight source units optical units units main body housing 750 is a hexahedron. Outer surfaces forming the hexahedron include atop surface 751, abottom surface 752, afront surface 753, aback surface 754, aleft side 755, and aright side 756. - The
top surface 751 of themain body housing 750 is an upper end located in an upper part in themain body housing 750. Thebottom surface 752 of themain body housing 750 is a bottom end as a surface opposed to thetop surface 751. Thefront surface 753 of themain body housing 750 is a front end facing thescreen 780 in themain body housing 750. Theback surface 754 of themain body housing 750 is a surface opposed to thefront surface 753 and is a rear end with the back thereof facing thescreen 780 in themain body housing 750. Theleft side 755 of themain body housing 750 is a side end located on the left side in front of thescreen 780. Theright side 756 of themain body housing 750 is a side end located on the right side in front of thescreen 780. - In this example, the
top surface 751, thebottom surface 752, thefront surface 753, and theback surface 754 of themain body housing 750 are rectangles having long sides extending from theleft side 755 to theright side 756. In this example, the projectingunit 740 b, the imagingoptical unit 730 b, thelight source unit 720 b, thelight source unit 720 a, the imagingoptical unit 730 a, and the projectingunit 740 a line up substantially in a straight line in this order from theleft side 755 to theright side 756 of themain body housing 750. In this example, thestand 760 is attached to thebottom surface 752 of themain body housing 750. - In the
main body housing 750,openings units main body housing 750 are provided such that projection lights from the projectingunits screen 780. In this example, themain body housing 750 houses the entire projectingunits main body housing 750 may house the projectingunits openings openings top surface 751 of themain body housing 750. The projectingunits top surface 751 as the same plane in themain body housing 750. - The
projector 710 further includes auser interface 791 and animage input unit 792. Theuser interface 791 of theprojector 710 receives instruction input from a user of theprojector 710. In this example, theuser interface 791 includes, in addition to plural buttons for receiving pressing input from the user, an infrared interface that receives infrared input from a remote controller. Theimage input unit 792 of theprojector 710 is connected to an external apparatus such as a personal computer and a digital image camera and receives the input of image data representing the image RP projected on thescreen 780. - With the
stand 760 explained above, as shown inFIG. 23 , it is possible to easily carry a projector set including thestand 760 by folding thefirst support leg 620 and thesecond support leg 640 to thepedestal 610, bringing thewheels 650 provided in thesecond support leg 640 into contact with the ground, and gripping thehandle 630 provided in thefirst support leg 620 to tug the projector set. - The
first support leg 620 and thesecond support leg 640 are foldable generally along the longitudinal direction of thepedestal 610. Thehandle 630 projects from theshort side surface 613 at one end in the longitudinal direction of thepedestal 610. Thewheels 650 project from theshort side surface 614 at an end on the opposite side of theshort side surface 613 in the longitudinal direction of thepedestal 610. This makes it possible to secure sufficient height from the floor surface FS to theprojector 710 in drawing out thefirst support leg 620 and thesecond support leg 640 from thepedestal 610 to set theprojector 710. Further, this makes it possible to secure sufficient length from thewheels 650 to thehandle 630 in folding thefirst support leg 620 and thesecond support leg 640 to thepedestal 610 to carry theprojector 710. - The
first support leg 620 is foldable to the connectingshaft 642 that connects thesecond support leg 640 to thepedestal 610. Thesecond support leg 640 is foldable to the connectingshaft 622 that connects thefirst support leg 620 to thepedestal 610. This makes it possible to reduce a load applied to the connectingshafts first support leg 620 and thesecond support leg 640 to thepedestal 610 to carry theprojector 710. - The
handle 630 has the bar-like section 632 substantially parallel to thewheel shaft 652 connected to thewheels 650. This makes it possible to bring the bar-like section 632 into contact with the floor surface FS to halt the rotation of thewheels 650 in drawing out thefirst support leg 620 and thesecond support leg 640 from thepedestal 610 to set theprojector 710. Further, this makes it possible to grip the bar-like section 632 and easily tug theprojector 710 in folding thefirst support leg 620 and thesecond support leg 640 to thepedestal 610 to carry theprojector 710. -
FIG. 28 is a diagram for mainly explaining the detailed configuration of astand 761 in the setting form in a first modification viewed from the direction opposed to thescreen 780. Thestand 761 in the first modification is the same as thestand 760 except that a mechanism for fixing thefirst support leg 620 and thesecond support leg 640 in the setting form is different. - In the
stand 761 in the first modification, pluralposition fixing holes first support leg 620 and thesecond support leg 640. Thefirst support leg 620 and thesecond support leg 640 can be fixed in multiple stages by insertingposition fixing pins 660 into oneposition fixing hole 628 and oneposition fixing hole 648 corresponding to each other among the pluralposition fixing holes position fixing holes handle 630 and thewheels 650 are set farther away from thepedestal 610 stepwise. In this example, there are fiveposition fixing holes 628 and fiveposition fixing holes 648, i.e., five pairs of fixingholes first support leg 620 and thesecond support leg 640 can be fixed in five stages. However, the number of stages for fixing thefirst support leg 620 and thesecond support leg 640 only has to be equal to or larger than two and is not limited to five. - With the
stand 761 in the first modification explained above, since the positions where thehandle 630 and thewheels 650 are set farther away from thepedestal 610 stepwise can be fixed in multiple stages, it is possible to adjust, in multiple stages, the height at which theprojector 710 is set. -
FIG. 29 is a diagram for mainly explaining the detailed configuration of astand 762 in the setting form in a second modification viewed from the direction opposed to thescreen 780. Thestand 762 in the second modification is the same as thestand 760 except that a mechanism for attaching theprojector 710 to thepedestal 610 is different. - The
stand 762 in the second modification includes arotary dial 672, an elevatingscrew 674, and anelevation guide 678. Therotary dial 672 of thestand 762 is connected to the elevatingscrew 674. The elevatingscrew 674 of thestand 762 is rotatably provided in thepedestal 610. Themain body housing 750 of theprojector 710 is attached to a screw section of the elevatingscrew 674. Theelevation guide 678 of thestand 762 prevents positional deviation of themain body housing 750 of theprojector 710 and thepedestal 610. When therotary dial 672 is rotated, the elevatingscrew 674 rotates and themain body housing 750 of theprojector 710 moves up and down relatively to thepedestal 610. In other words, therotary dial 672, the elevatingscrew 674, and theelevation guide 678 configure a height adjusting unit that adjusts height at which theprojector 710 is installed on thepedestal 610. - With the
stand 762 in the second modification explained above, it is possible to adjust height at which theprojector 710 is set while keeping thefirst support leg 620 and thesecond support leg 640 fixed. - The embodiment of the invention is explained above. However, the invention is not limited to such an embodiment. It goes without saying that the invention can be carried out in various forms without departing from the spirit of the invention.
- For example, the
handle 630 of thestand 760 may come into contact with the ground via a non-slip member having a coefficient of friction higher than that of thefirst support leg 620.FIG. 30 is a diagram for explaining thehandle 630 in another embodiment. The bar-like section 632 of thehandle 630 shown inFIG. 30 is covered with anon-slip member 638. Thepedestal 610, thefirst support leg 620, and thesecond support leg 640 in thestand 760 are made of metal. Thenon-slip member 638 is formed of a material having a coefficient of friction higher than that of a metal surface. In this example, thenon-slip member 638 is formed of elastomer resin such as rubber or thermoplastic elastomer. With thehandle 630 shown inFIG. 30 , it is possible to prevent thestand 760 from shifting from the floor surface FS. - The
stand 760 may include a stopper that halts the rotation of thewheels 650. This makes it possible to easily perform work for transforming thestand 760 between the setting form and the carrying form and prevent thestand 760 from shifting from the floor surface FS in the setting form. Thewheel shaft 652 of thewheels 650 may be provided to cross the bar-like section 632 of thehandle 630 rather than being provided substantially in parallel to the bar-like section 632 of thehandle 630. - The fixing of the
first support leg 620 and thesecond support leg 640 is not limited to the mechanism for fitting pins in grooves or holes. Other well-known mechanisms employing a spring and an engaging member may be used. Thewheels 650 may be provided in thefirst support leg 620 and thehandle 630 may be provided in thesecond support leg 640. Theprojector 710 attached to thestand 760 is not limited to the projector including the two projecting units. Theprojector 710 may be a projector including one projecting unit or may be a projector including three or more projecting units. -
FIG. 31 is a schematic diagram for explaining the configuration of aprojector 900. Theprojector 900 includes a projectormain body 810, a first connectingunit 830, and a second connectingunit 840 and assumes a substantially square columnar shape as a whole. - The projector
main body 810 includes an image processing unit (not shown in the figure), an illumination optical unit (not shown in the figure), a liquid crystal panel (not shown in the figure), a projectionoptical unit 821, and the like and a housing (explained later) that houses the foregoing therein. The projectormain body 810 generates, on the basis of image data input from a personal computer, an optical disk player, or the like, image light representing an image indicated by the image data. The projectormain body 810 projects the image lights on a projection surface and displays the image on the projection surface. - When
plural projectors 900 are connected, the first connectingunit 830 and the second connectingunit 840 fix a distance and a tilt (i.e., a positional relation) between theprojectors 900 adjacent to each other. As explained later, the first connectingunit 830 and the second connectingunit 840 are detachably attachable to the projectormain body 810. -
FIG. 32 is a schematic diagram of a state in which the first connectingunit 830 and the second connectingunit 840 are removed from the projectormain body 810. Ahousing 822 included in the projectormain body 810 includes afitting section 823 and afitting section 827 at both the ends thereof. An external shape of thehousing 822 is a substantial rectangular parallelepiped shape. Thefitting section 823 fits with the first connectingunit 830. Thefitting section 823 hasprojections 824 for maintaining a state of fitting with the first connectingunit 830. Theprojections 824 are configured to recess when pressed and return to the original state (project) when pressing force stops being applied. Therefore, when thefitting section 823 is inserted in the first connectingunit 830, theprojections 824 fit in through holes for fixing 833 (explained later) of the first connectingunit 830. The first connectingunit 830 is attached to the projectormain body 810 and fixed. - On the other hand, the
fitting section 827 fits with the second connectingunit 840. Like thefitting section 823, thefitting section 827 hasprojections 828 for maintaining a state of fitting with the second connectingunit 840. Therefore, when thefitting section 827 is inserted in the second connectingunit 840, theprojections 828 fit in through holes for fixing 843 (explained later) of the second connectingunit 840. The second connectingunit 840 is attached to the projectormain body 810 and fixed. - The first connecting
unit 830 includes acylindrical unit 832 and afitting section 836. Thecylindrical unit 832 assumes a substantially square cylindrical shape. One end of thecylindrical unit 832 is opened and the other end thereof is sealed by asealing unit 835.Exhaust ports 834 for discharging the air, which is discharged from the projectormain body 810, to the outside of theprojector 900 are provided in thecylindrical unit 832. Theexhaust ports 834 are provided in all surfaces (four surfaces) of thecylindrical unit 832 that assumes the substantially square cylindrical shape. At the opened one end of thecylindrical unit 832, the through holes for fixing 833 for fixing a state of fixing of the projectormain body 810 with thefitting section 823 are provided. As explained above, theprojections 824 of the projectormain body 810 are fit in the through holes for fixing 833. - The
fitting section 836 fits with the second connectingunit 840 of another projector. Thefitting section 836 hasprojections 837 for fixing a state of fitting with the second connectingunit 840. Theprojections 837 have structure same as that of theprojections 824 of the projectormain body 810. - The second connecting
unit 840 assumes a substantially square cylindrical shape same as that of thecylindrical unit 832. Both the ends of the second connectingunit 840 are opened.Inlet ports 844 for supplying the air to the projectormain body 810 are provided in the second connectingunit 840. Theinlet ports 844 are provided in all surfaces (four surfaces) of the second connectingunit 840 that assumes the substantially square cylindrical shape. - Through holes for fixing 843 for maintaining a state of fitting of the projector
main body 810 with thefitting section 827 are provided at one end of the second connectingunit 840. As explained above, theprojections 824 of the projectormain body 810 are fit in the through holes for fixing 843. On the other hand, through holes for fixing 846 for maintaining a state of fitting of the other projector with the first connectingunit 830 is provided at the other end of the second connectingunit 840. - The first connecting
unit 830 and the second connectingunit 840 assume the substantially square cylindrical shape. When attached to the projectormain body 810 as explained above, the first connectingunit 830 and the secondconnected unit 840 change to a shape formed by extending thehousing 822, which assumes the substantially rectangular parallelepiped shape, in a longitudinal direction thereof. In other words, theprojector 900 assumes a substantially square cylindrical shape as a whole. - In this example, each of the
projections unit 830 and the second connectingunit 840 to the projectormain body 810, it is possible to easily attach the first connectingunit 830 and the second connectingunit 840 simply by inserting thefitting section 823 and thefitting section 827 in the first connectingunit 830 and the second connectingunit 840, respectively. - As explained above, the first connecting
unit 830 includes thefitting section 836 that fit with the second connectingunit 840 of another projector and theprojections 837. The second connectingunit 840 has the through holes for fixing 846 in which theprojections 837 of the other projector fit. Therefore, when two projectors 900 (e.g., afirst projector 900A and asecond projector 900B) are connected, thefitting section 836 of thesecond projector 900B is inserted into the second connectingunit 840 of thefirst projector 900A. Then, theprojections 837 of thesecond projector 900B fit in the through holes for fixing 846 of the second connectingunit 840 of thefirst projector 900A. The first connectingunit 830 of thesecond projector 900B and the second connectingunit 840 of thefirst projector 900A are connected. As a result, thefirst projector 900A and thesecond projector 900B are connected. -
FIG. 33 is a diagram for explaining a connection process for threeprojectors 900. InFIG. 33 , the threeprojectors 900 are the same projectors. However, to clarify the explanation, theprojector 900 shown on the left side on the paper surface is referred to asprojector 900A, theprojector 900 shown in the center is referred to asprojector 900B, and theprojector 900 shown on the right side is referred to asprojector 900C. Similarly, projectormain bodies 810, the first connectingunits 830, and the second connectingunits 840 included in theprojectors 900 are referred to with A, B, and C affixed to the ends of the reference numerals. - As explained above, the projections 837 (
FIG. 32 ) are configured to recess when pressed and return to the original state (project) when pressing force stops being applied. Therefore, as shown inFIG. 33 , it is possible to easily connect thefirst projector 900A and thesecond projector 900B simply by inserting the fitting section 836A of thesecond projector 900E into the second connectingunit 840A of thefirst projector 900A. Similarly, it is possible to easily connect thesecond projector 900E and thethird projector 900C simply by inserting the fitting section into the connecting section. In this way, thefirst projector 900A, thesecond projector 900B, and thethird projector 900C are easily connected. - The
first projector 900A, thesecond projector 900B, and thethird projector 900C are the same projectors. The length of the first connectingunits units main body 810A and the projectormain body 810E and a distance between the projectormain body 810E and the projector main body 8100 are the same. - As explained above, the
projectors projectors main bodies first projector 900A, thesecond projector 900B, and thethird projector 900C are accurately connected. -
FIG. 34 is an enlarged diagram of an X section inFIG. 33 . Wiring 831B is applied to the first connecting unit 8308 of thesecond projector 900E in order to electrically connect thesecond projector 900E to thefirst projector 900A. Wiring (not shown in the figure) is also applied to the second connectingunit 840 of thefirst projector 900A in order to electrically connect thefirst projector 900A to thesecond projector 900B. Therefore, when thefirst projector 900A and thesecond projector 900B are connected via the second connectingunit 840A and the first connectingunit 830B, thefirst projector 900A and thesecond projector 900B are electrically connected. - Therefore, for example, unless the
first projector 900A and thesecond projector 900B are connected by using a separate cable, image data, control signals, and the like can be communicated between thefirst projector 900A and thesecond projector 900B. Thefirst projector 900A can be connected to a commercial power supply to supply power to thesecond projector 900E via the projectormain body 810A. The same holds true for thethird projector 9000. Therefore, thefirst projector 900A, thesecond projector 900B, and thethird projector 900C are electrically connected as well. -
FIG. 35 is a diagram for explaining a flow of the air flowing through the threeprojectors 900 when theprojectors 900 are connected and used. When attention is paid to thesecond projector 900B, the projectormain body 810B includes, in the inside of ahousing 822, anexhaust fan 829 for drawing out the air. As explained above, the first connectingunit 830B of thesecond projector 900B includes asealing unit 835B at an end on a side connected to the second connectingunit 840A of thefirst projector 900A. Similarly, the first connectingunit 830C of thethird projector 900C includes asealing unit 835C. Therefore, when thefirst projector 900A, thesecond projector 900B, and thethird projector 900C are connected, both the ends of thesecond projector 900B are sealed by the sealingunit 835B of the first connectingunit 830B and thesealing unit 835C of the first connectingunit 830C included in thethird projector 900C. - Therefore, as indicated by an arrow in
FIG. 35 , the air is led into the projectormain body 810 via theinlet ports 844 of the second connectingunit 840B during operation of theexhaust fan 829. The air led into the projectormain body 810E passes through the projectormain body 810B while depriving the heat of heat generating components in the projectormain body 810B. The air is discharged to the outside of thesecond projector 900E via theexhaust ports 834 of the first connectingunit 830B. - The
second projector 900E and thefirst projector 900A are separated by the sealingunit 835B. Therefore, it is less likely that the air warmed in the projectormain body 810B is led into the projectormain body 810A through the first connectingunit 830E and the second connectingunit 840A of thefirst projector 900A. As a result, it is possible to reduce the likelihood that thefirst projector 900A is heated by the exhaust of thesecond projector 900B and the components in the projectormain body 810E fail because of overheating. -
FIG. 36 is a diagram of an example in which the threeprojectors 900 are connected and used. Thefirst projector 900A, thesecond projector 900B, and thethird projector 900C are linearly connected as shown inFIG. 33 to configure aprojector system 910. As shown inFIG. 36 , on a huge horizontally-long screen SC, thefirst projector 900A displays a first image IG1, thesecond projector 900B displays a second image IG2, and thethird projector 900C displays a third image IG3. As a result, a horizontally-long image IG is displayed on the screen SC. - Image data representing an image to be displayed on the screen SC is supplied, for example, from a not-shown personal computer to the
first projector 900A. Thefirst projector 900A recognizes that the threeprojectors 900 are connected, generates divided data obtained by dividing the image represented by the input image data, and transfers the divided data to thesecond projector 900B and thethird projector 900C. - For example, when a large-area image is displayed over the entire wall surface of an event hall by using plural projectors, in the past, a dedicated shelf is prepared and the plural projectors are placed on the shelf. Since the dedicated shelf is huge, it is very hard to set the shelf. When the projectors are placed on the dedicated shelf, the projectors have to be accurately arranged with distances, tilts, and the like among the projectors fixed. Therefore, work is complicated and consumes labor and time.
- On the other hand, the
projector 900 in this example includes the first connectingunit 830 and the second connectingunit 840. Therefore, if theplural projectors 900 are prepared, it is possible to easily connect theplural projectors 900 unless a shelf and instruments are used besides theprojectors 900. - Since distances between the first connecting
units 830 and the second connectingunits 840 are fixed, distances among the projectionoptical units 821, from which image lights projected on the screen SC are emitted, are fixed. Therefore, it is possible to display an accurate large-area image using theplural projectors 900. - For example, when a large-area image is displayed by using a FPD (Flat Panel Display) such as a liquid crystal display, plural FPDs are arranged to display the image. Therefore, a viewer may feel that seams among the FPDs are disturbing. On the other hand, if the
plural projectors 900 in this example are connected to display a large-area image, as a projection surface such as a screen or a wall surface, a large projection surface without a seam can be used. -
FIG. 37 is a schematic diagram for explaining the configuration of aprojector system 910A. Theprojector system 910A includes plural projectormain bodies 810 and plural connectingunits main bodies 810 are hatched. In theprojector system 910A in this example, three projector main bodies are connected horizontally and four projector main bodies are connected vertically via the connectingunits 860 to 890, i.e., twelve projectormain bodies 810 are connected in total to form a lattice shape as a whole. - The projector
main bodies 810 are the same as that in the example E1. All the connectingunits main bodies 810, although shapes thereof are different. Like the connectingunits main bodies 810 and other connecting units are provided at leading ends of the connectingunits - As shown in
FIG. 37 , a projector system including the plural projectormain bodies 810 and assuming a lattice shape as a whole can be constructed by using the connectingunits 860 to 890 having the different shapes. - In this way, in the
projector system 910A the projectormain bodies 810 are connected via the connectingunits 860 and the like. Therefore, for example, distances among the projectormain bodies 810 can be changed by changing connecting units. For example, the distances among the projectormain bodies 810 can be adjusted by using connecting units corresponding to the size of a display image and a projection distance. Therefore, a user can cope with various situations by preparing plural kinds of connecting units and changing the distances among the projectormain bodies 810 without preparing projectors having different projection abilities according to setting places, purposes of use, and the like. - The invention is not limited to the examples explained above and can be carried out in various forms without departing from the spirit of the invention.
- (1) In the example E1 explained above, the first connecting
unit 830 and the second connectingunit 840 are detachably attachable to the projectormain body 810. However, the first connectingunit 830 and the second connectingunit 840 may be integrally formed with the projectormain body 810 and configured unremovable. - For example,
FIG. 38 is a schematic diagram of projectors in a modification. Aprojector 900E in the modification includes a projectormain body 810E, a first connectingunit 830E, and a second connectingunit 840E. The second connectingunit 840E includes afitting section 850E that fits in a first connectingunit 830F of aprojector 900F andprojections 852E for maintaining a state of fitting with the first connectingunit 830F. Theprojections 852E are configured to recess when pressed and return to the original state (project) when pressing force stops being applied. - The
projector 900F includes a projectormain body 810F, a first connectingunit 830F, and a second connectingunit 840F. Through holes for fixing 833F that fit with theprojections 852E are provided in the first connectingunit 830F of theprojector 900F. - Therefore, as indicated by an arrow in the figure, when the second connecting
unit 840E of theprojector 900E is inserted into the first connectingunit 830F of theprojector 900F, theprojections 852E fit in the through holes for fixing 833F of the first connectingunit 830F. Theprojector 900E and theprojector 900F are connected and fixed. - Similarly, when the first connecting
unit 830E of theprojector 900E is inserted into the second connectingunit 840F of theprojector 900F,projections 837E fit in through holes for fixing 843F of the second connectingunit 840F. Theprojector 900E and theprojector 900F are connected and fixed. It is possible to easily connect plural projectors by connecting theprojector 900E and theprojector 900F each other in this way. - Only one of the first connecting
unit 830 and the second connectingunit 840 may be detachably attachable. Effects same as those in the example E1 explained above can be obtained even when only one of the connecting units is detachably attachable. - The shape of the first connecting
unit 830 and the second connectingunit 840 is not limited to that explained in the example E1. For example, the connectingunits 860 explained in the example E2 may be provided on both the sides of the projectormain body 810 instead of the first connectingunit 830 and the second connectingunit 840. This makes it possible to vertically arrange and connect the two projectors. - (2) The transfer method for image data is not limited to the example E1 explained above. For example, one personal computer may be connected to each of the three
projectors 900 and divided image data indicating divided images obtained by dividing a displayed image into three may be supplied from the personal computer to correspond to a display position of each of theprojectors 900. This also makes it possible to display a large-area image as in the example explained above. - In the example explained above, each of the
projectors 900 displays the image obtained by dividing one horizontally-long image. However, images displayed by theplural projectors 900 are not limited to those explained in the example.FIGS. 39A to 39C are diagrams of modifications of an image displayed by the three projectors in the example E1. For example, theprojectors 900 may display the same image and, as a result, three same images may be displayed side by side on the screen SC (FIG. 39A ). Theprojectors 900 may display different independent images (FIG. 39B ). Thefirst projector 900A and thesecond projector 900E may form one image and thethird projector 900C may display an image same as the image formed by thefirst projector 900A and thesecond projector 900E (FIG. 39C ). - (3) In the example E1 explained above, the first connecting
unit 830 in theprojector 900 includes thesealing unit 835 and theexhaust port 834. However, theprojector 900 does not have to include thesealing unit 835 and theexhaust port 834. When theprojector 900 does not include thesealing unit 835 and theexhaust port 834, theprojector 900 inhales the air discharged from theadjacent projector 900 connected thereto. Therefore, theprojector 900 may include a device that cools the discharged air, a device that cools theentire projector 900, or the like. An air inlet (e.g., a mesh port) for cooling may be provided in thehousing 822 included in the main body of theprojector 900. - (4) In the example E1 explained above, the wiring is applied to the first connecting
unit 830 and the second connectingunit 840. When the twoprojectors 900 are connected to each other via the first connectingunit 830 and the second connectingunit 840, the twoprojectors 900 can be electrically connected as well. However, the wiring does not have to be applied to the first connectingunit 830 and the second connectingunit 840. - (5) The structure for connecting the first connecting
unit 830, the second connectingunit 840, and the projectormain body 810 is not limited to that explained in the example E1. The first connectingunit 830, the second connectingunit 840, and the projectormain body 810 can be connected by various publicly-known methods.FIG. 40A is a sectional view of a modification of the second connectingunit 840A of thefirst projector 900A.FIG. 40B is a sectional view of a modification of the first connectingunit 830B of thesecond projector 900B. - As shown in
FIG. 40A , a second connectingunit 840H in a modification A includes apawl section 841. Thepawl section 841 is urged to the inner side of the second connectingunit 840H by a spring (an arrow C). When thepawl section 841 is pressed as indicated by an arrow A in the figure, thepawl section 841 rotates as indicated by an arrow B in the figure. Afitting section 836H of a first connecting unit 830H in the modification A has apawl section 839. Thefitting section 836H of the first connecting unit 830H is inserted into the second connectingunit 840H while thepawl section 841 of the second connectingunit 840H is pressed (an arrow A). When the force applied to the pawl section 841 (the arrow A) is released, thepawl section 841 is urged by the spring (an arrow C), meshes with thepawl section 839 of the first connecting unit 830H, and the first connecting unit 830H and the second connectingunit 840H are connected. This also makes it possible to easily connect the first connecting unit 830H and the second connectingunit 840H simply by inserting the first connecting unit 830H into the second connectingunit 840H. - As shown in
FIG. 40B , a fitting section 836I of a first connecting unit 830I and a second connecting unit 840I in a modification B respectively include through holes 848I and 849I. The fitting section 836I of the first connecting unit 830I is inserted into the second connecting unit 840I, positions of the through holes 848I and 849I are adjusted, and a connection pin P is pressed into the through holes 848I and 849I, whereby the first connecting unit 830I and the second connecting unit 840I are connected and do not come off. This also makes it possible to easily connect the first connecting unit 830I and the second connecting unit 840I. - (6) In the example explained above, the
projector 900 modulates light from the illumination optical unit 825 using the transmissive liquid crystal panel 826. However, a light modulating device is not limited to the transmissive liquid crystal panel 826. For example, theprojector 900 may modulate light from the illumination optical unit 825 using a digital micro-mirror device (DMD (registered trademark)), a reflective liquid crystal panel (liquid crystal on silicon (LCOS (registered trademark)), or the like. - The examples and the modifications in the first to fifth embodiments explained above may be applied to examples and modifications in other embodiments. For example, at least one of the stand in the fourth embodiment and the connecting unit in the fifth embodiment may be combined with the projectors according to the first to third embodiments.
- The entire disclosure of Japanese Patent Application Nos. 2008-300435, filed Nov. 26, 2008 and 2008-309777, filed Dec. 4, 2008 and 2008-306290, filed Dec. 1, 2008 and 2008-314174, filed Dec. 10, 2008 and 2008-319164, filed Dec. 16, 2008 and 2009-203400, filed Sep. 3, 2009 are expressly incorporated by reference herein.
Claims (15)
1. A projector that projects an image on a screen, comprising:
plural image generating units that generate an image lights representing the image;
a main body housing that houses the plural image generating units; and
plural projection optical units that are provided in the main body housing to respectively correspond to the plural image generating units and project the image lights generated by the image generating units on the screen.
2. The projector according to claim 1 , wherein
each of the plural image generating units generates the image light representing a partial image corresponding to a part of a display area in an image projected on the screen, and
each of the plural projection optical units projects the image light generated by the image generating unit on the display area corresponding to the partial image on the screen.
3. The projector according to claim 1 , wherein
the main body housing has plural planes that form an outer surface, and
the plural projection optical units are provided on a same plane in the main body housing.
4. The projector according to claim 1 , wherein the plural image generating units and the plural projection optical units line up substantially in a straight line.
5. The projector according to claim 1 , wherein an optical axis of image light projected from the projection optical unit located at an end of the line of the plural projection optical units inclines in a direction opposite to a direction in which the other projection optical units adjacent to the projection optical unit are located.
6. The projector according to claim 1 , further comprising:
a light source and
a light distributing unit that distributes the light from the light source to the respective plural image generating units.
7. The projector according to claim 1 , wherein
an extending and retracting unit that extends and retracts the main body housing in a direction in which the plural projection optical units are connected.
8. The projector according to claim 7 , wherein the extending and retracting unit includes a holding unit that holds a state in which the main body housing is extended or retracted.
9. The projector according to claim 7 , further comprising:
an extension and retraction detecting unit that detects an extension/retraction distance of the extended or retracted main body housing; and
an image adjusting unit that adjusts, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.
10. The projector according to claim 9 , wherein the image adjusting unit includes an expansion and reduction adjusting unit that expands and reduces, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.
11. The projector according to claim 9 , wherein the image adjusting unit includes an optical-axis adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, optical axes of image lights projected from the plural projection optical units.
12. The projector according to claim 9 , wherein the image adjusting unit includes an autofocus unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, focuses of projection lights projected from the plural projection optical units.
13. The projector according to claim 9 , wherein the image adjusting unit includes a keystone-distortion correction unit that corrects, according to the extension/retraction distance detected by the extension and retraction detecting unit, a keystone distortion of an image projected on the screen.
14. The projector according to claim 7 , wherein
each of the plural image generating units generates the image light representing a partial image corresponding to a part of a display area in an image projected on the screen, and
each of the plural projection optical units projects the image light generated by the image generating unit on the display area corresponding to the partial image on the screen.
15. A projector that projects an image on a screen, comprising:
plural image generating units that generate an image lights representing the image;
a main body housing that houses the plural image generating units;
plural projection optical units in the main body housing to respectively correspond to the plural image generating units; and
an imaging sensor that is provided between the projection optical unit.
Applications Claiming Priority (12)
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JP2008-300435 | 2008-11-26 | ||
JP2008300435 | 2008-11-26 | ||
JP2008-306290 | 2008-12-01 | ||
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JP2008-314174 | 2008-12-10 | ||
JP2008319164 | 2008-12-16 | ||
JP2008-319164 | 2008-12-16 | ||
JP2009203400A JP5444963B2 (en) | 2008-11-26 | 2009-09-03 | projector |
JP2009-203400 | 2009-09-03 |
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JP2010164942A (en) | 2010-07-29 |
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